Coros Pace 3 vs Garmin 255: key differences to run better

The comparison between the Coros Pace 3 and the Garmin Forerunner 255 has become one of the most repeated among runners looking for a serious, lightweight watch with enough battery life to train for several days without reaching for the charger. Both play in the same league, but they do not offer exactly the same experience: Coros pushes harder on battery life and price, while Garmin responds with a more mature ecosystem and extra features that matter in daily use.

In numbers, the difference exists and it shows. The Pace 3 usually sells for around 229 euros, while the Forerunner 255 starts at higher figures and, depending on the version and market, can easily approach or exceed 266 euros, with the Music model even higher. That gap is not small in a segment where every euro competes with sensors, battery life, navigation, and ease of use.

Two very similar watches on the road, but not identical

On paper they share many basics: multiband GPS, optical heart rate sensor, barometric altimeter, compass, accelerometer, gyroscope, sleep tracking, and compatibility with Android and iPhone. They are also watches designed for running, with training profiles, load metrics, and simple navigation features to follow routes or retrace your steps.

The comparison becomes interesting when you move from the spec sheet to real-world use. Coros leans toward a more minimalist philosophy, with a lightweight watch, generous battery life, and a mixed control scheme of buttons, crown, and touchscreen. Garmin, by contrast, maintains the classic identity of the Forerunner series: physical buttons, a highly polished interface, and a broader layer of sports and health features, though also a more expensive one.

That contrast explains why both models appeal to different runners. The Pace 3 fits better for someone who wants to spend less and charge less often. The Forerunner 255 appeals to those who value a more complete platform, ANT+ accessory integration, and software details that make life easier for long-distance runners, amateur triathletes, or data enthusiasts.

Design, size, and wrist comfort

The Coros Pace 3 is more discreet and lighter. Its weight is around 39 grams with a silicone strap and drops even further with the nylon version, a difference you notice on long runs, track intervals, or full days of wear. Garmin, for its part, sits between the 49 grams of the Forerunner 255 and the 39 grams of the 255S, a still modest figure, but less radical than Coros.

The displays tell a different story too. The Pace 3 uses a 1.2-inch panel with a resolution of 240 x 240 pixels and a touchscreen. The Forerunner 255 goes up to 1.3 inches in its larger version, with 260 x 260 pixels, though without touch. MIP technology in both cases favors readability in the sun, something useful for anyone running in bright light who does not want to depend on an AMOLED display.

In the hand, Garmin conveys a more robust, classic feel, with Gorilla Glass 3 and a five-button layout appreciated by those who train with gloves, in the rain, or with sweaty hands. Coros, meanwhile, opts for a simpler, more modern ergonomics, with fewer buttons and a crown that speeds up some menu navigation. There is no absolute winner here; it is a matter of taste, habit, and tolerance for friction.

Display and controls: buttons versus touch

The Coros Pace 3 navigation is more flexible for those who enjoy the touchscreen outside workouts and want to move quickly through menus, widgets, or data screens. That mix of touch and crown makes the watch feel closer to a less rigid everyday use, although touch loses some of its appeal when there is sweat, rain, or sudden movement.

Garmin continues to defend button control as a virtue, not a shortcoming. The logic is easy to understand: less dependence on the finger, more precision while running, and fewer surprises when gestures become complicated. It is an older system, yes, but also a more predictable one, and that on a climb, during a fast run, or when checking split times on a track full of curves can become an advantage.

The visual difference matters too. The Forerunner 255 offers a slightly larger, higher-resolution screen, which helps with reading dense metrics. The Pace 3 is not competing for visual impact, but for practicality. It is a screen that gets the job done, not one that dazzles. And in a training watch, that choice is not minor: less spectacle usually means more battery life.

Battery life: where Coros really pulls ahead

Battery life is one of the clearest reasons to look at the Pace 3. Coros claims up to 24 days of normal use and 38 hours with GPS, figures that surpass those of the Forerunner 255, which sits at around 14 days of general battery life and 30 hours with GPS on the larger version. In real life, those numbers translate into less charger anxiety and more freedom to chain workouts, trips, and high-volume training weeks.

The right interpretation, however, requires nuance. When multiband GPS is activated or advanced features are pushed hard, both watches shorten their endurance. Even so, Coros maintains a structural advantage in duration, especially for long-distance runners, ultrarunners, or people who prefer to forget about the cable for days. Garmin compensates with very efficient power management, but it does not match that margin.

Charging speed matters too. Both take around two hours for a full recharge, a reasonable figure for watches in this segment. The difference is that the Pace 3 forces you to plug in less often. In everyday use, that simple convenience changes your relationship with the watch, because it becomes something that accompanies you without interrupting you.

GPS and accuracy on demanding routes

Both use multiband GPS and perform well in cities, forests, and complex areas. There is no huge gap in accuracy here, but rather differences in behavior. Coros usually locks onto the signal quickly and in some scenarios gives a very responsive feel when starting an activity. Garmin, on the other hand, offers very solid tracking and, in many cases, a slightly more refined route drawing when tall buildings or narrow streets appear.

For running, the important nuance is not just whether the map looks nice, but whether distance and average pace remain reliable. In that regard, both watches perform at a very high level. Coros may show slight variations on the track or during very aggressive pace changes, while Garmin benefits from its experience with algorithms and satellite management with SatIQ, which adjusts power use according to signal quality.

On open routes, mountain workouts, and long road sessions, the practical difference becomes even smaller. Anyone running along the coast, in urban parks, or on trails in the Valencian Community will find two tools capable of recording activity well. The decision, therefore, depends less on base accuracy and more on which navigation and battery system fits each routine better.

Training and recovery metrics

Garmin gains ground when the analytical side comes into play. The Forerunner 255 includes Training Status, acute load, training effect, VO2 max, grade-adjusted pace, recovery time, and high or low heart rate notifications. It also offers a Morning Report and Body Battery, two features that help place the session within the body’s overall state and not just raw performance.

Coros is not far behind, but its approach is more stripped down. EvoLab provides training load, fatigue, fitness base, race prediction, recovery times, and intensity distribution. The information is there, it is just presented with less narrative layering. For some runners that is a virtue; for others, a small lack of context that forces more personal interpretation.

The difference is also noticeable in the guided training approach. Garmin offers daily suggestions, plans, and broader integration with its ecosystem. Coros responds with personalized marathon plans and tools aimed at runners who want to track their progress with clear numbers. If the user wants a compass that translates fatigue into decisions, Garmin has the edge. If they just want a clean reading of load, pace, and progress, Coros is more direct.

Smart features, music, and connectivity

Garmin is more ambitious outside training. The Forerunner 255 offers Garmin Pay, ANT+ support in most versions, inactivity alerts, abnormal heart rate notifications, and an app store that expands possibilities with watch faces, data fields, and external tools. It also connects with smart scales in its mobile ecosystem and delivers a feel of a more closed, but more mature, platform.

Coros compensates with Wi-Fi, fast syncing, and 4 GB of music storage included without requiring the purchase of a higher-tier version. That matters, because in Garmin music is a more expensive entry point: there are Music models that raise the price. In return, Garmin integrates streaming services like Spotify, Deezer, or Amazon Music, while Coros continues to rely on manual MP3 file transfers from the computer.

In pure connectivity, Garmin also has the advantage of ANT+, useful for certain sensors and cycling or gym accessories. Coros relies on Bluetooth and Wi-Fi, enough for most people, but a bit less versatile if you think about specific peripherals. For the runner who lives attached to the watch and does not want complications, both are valid; for those who mix sports, sensors, and services, Garmin opens more doors.

Health data and daily tracking

Both watches track sleep, steps, heart rate, blood oxygen, and daily activity. In a pure running comparison that may seem secondary, but in practice runners look more often than they think at how they slept, how much load they have accumulated, or whether resting heart rate is rising. That data environment is what helps interpret a bad session, a heavy week, or a slower-than-expected recovery.

Garmin offers a broader everyday health package. It has inactivity alerts, more detailed stress tracking, and a more polished presentation of daily trends. Coros offers the essentials with fewer embellishments. The difference is not raw quality, but depth and finish. Garmin presents the information more elegantly; Coros simplifies it so it does not become noise.

In the day-to-day life of a recreational runner, that difference can matter more than it seems. Someone who trains before work may appreciate Coros’s brief summary. Someone who uses the watch as a control center for load, rest, and overall activity will see more value in Garmin’s software layer. The hardware supports the effort in both cases; the experience changes in the details.

Price, value, and the real cost of choosing one or the other

Price explains much of the debate. The Pace 3 was created as a highly competitive watch in terms of value for money, with a very refined offering for those who prioritize battery life, lightness, and training metrics without wanting to move up to higher-end models. The Forerunner 255 costs more, especially if you want the Music version, but it gives back a more complete ecosystem, better service integration, and a more rounded product feel.

The key is what each runner considers essential. If budget is the priority and the goal is to train with a reliable, lightweight watch with great battery life, Coros is in a very strong position. If the user values mobile-free payments, ANT+, more profiles, daily suggestions, and a more polished health layer, Garmin justifies the higher price better. Not because of absolute superiority, but because of functional breadth.

You also have to look at the real market, not just the official price. The Forerunner 255 often appears on sale, and when it drops significantly the gap with the Pace 3 narrows quite a bit. That is where the balance can shift, because Garmin stops seeming expensive and becomes an especially solid option. Coros, for its part, usually maintains a very coherent value equation even without discounts. One wins on initial cost; the other, on the overall package.

Which runner is better suited to each model

The Coros Pace 3 fits the runner who wants lots of battery life, little weight, and a clean approach. It is a good choice for someone who runs several times a week, does long runs, values integrated music without paying extra, and prefers a simple interface. It is also very compelling for trail runners and route enthusiasts who do not need an arsenal of smart features.

The Garmin Forerunner 255 is a better fit for those who want a more versatile watch, with more software depth and more tools around training. It is especially appealing for runners who cross sports, use external sensors, or want a more complete experience in health and recovery. Its greatest strength is not one single metric, but the sum of small advantages that show up over the weeks.

The final decision is less about choosing the best watch and more about choosing the one that fits a routine. Coros cuts the noise and lightens the wrist. Garmin adds layers and organizes more information. One runs lighter; the other, more supported. And in that contrast, which seems technical but ends up being very human, a large part of the purchase is decided.

A watch duel that says a lot about today’s runner

The comparison between the Pace 3 and the Forerunner 255 reflects how the running market has changed. It is no longer enough to measure kilometers and heartbeats. Runners want real battery life, clear readings, useful navigation, load metrics, accessory compatibility, and an experience that does not fall apart when the watch gets mud, rain, or the last repeat of a long interval session.

Coros has managed to push the market toward lightness and efficiency. Garmin, meanwhile, continues to defend the value of a more polished and broader ecosystem. Both approaches make sense, which is why this comparison remains relevant. There is no universal winner, only a choice that changes depending on the type of training, budget, and data hunger of the runner.

In practice, both watches do what really matters very well: record effort accurately, last for many hours, and not become a burden. Everything else is nuance, but nuance matters. In a sport where a second per kilometer, a bad night’s sleep, or a battery at 8% can change a run, choosing the right watch is also a way to fine-tune the race.

Este artículo contiene enlaces de afiliado: si compras a través de ellos, se genera una pequeña comisión sin coste adicional para ti. Más información.