Bottom line: The COROS PACE 3 costs $199. The Garmin Forerunner 265 costs $449.99. The cheaper watch has better GPS hardware and nearly double the battery life. You are paying the $250 difference for a screen and an ecosystem, and for a lot of runners that is a genuinely good trade. For a lot of others it is $250 they did not need to spend.
Check COROS PACE 3 Price → Check Garmin FR265 Price →
Prices and specifications come from each manufacturer’s Amazon listing, checked in July 2026. Both were in stock, though COROS availability on Amazon can be intermittent.
The Uncomfortable Part: The $199 Watch Has Better GPS
The PACE 3 has dual-frequency GPS. The FR265 does not. That is the single most surprising thing in this comparison and it runs directly against what the price tags imply.
Dual-frequency means the watch receives two satellite signal bands instead of one. When a signal bounces off a building or scatters through tree cover before reaching your wrist, the two bands distort differently, and the watch can use that discrepancy to identify and discard the reflection. Single-band watches have no way to distinguish a bounced signal from a clean one, which is why pace readings go strange between tall buildings and under dense canopy.
If you run in a city centre or on wooded trails, that is not a spec-sheet curiosity. It decides whether your splits are worth training from. If you run open roads and a track, you will likely never notice, and Garmin’s single-band positioning is perfectly accurate there. We made the same point when the Polar Vantage M3 turned up with the same advantage over the same Garmin.
Battery goes the same direction. COROS rates the PACE 3 at 38 hours continuous GPS and up to 24 days of daily use. Garmin rates the FR265 at 20 hours GPS and up to 13 days. The cheaper watch lasts roughly twice as long on both measures.
See PACE 3 on Amazon → See FR265 on Amazon →
So What Does $250 Actually Buy?
Three things, and they are real. Whether they are worth $250 depends entirely on you.
The screen. The FR265 has a bright AMOLED display. The PACE 3 uses a transflective panel, which reflects ambient light rather than generating its own. Transflective is always-on at near-zero power draw and gets more readable as sunlight brightens, which is why the COROS battery figures look the way they do. It also looks dim and dated indoors next to an AMOLED. This is the trade behind the whole comparison, and we went through the physics in our PACE 4 versus PACE 3 breakdown.
The ecosystem. This is the strongest argument for Garmin and the hardest to quantify. Garmin Connect is free, enormous, and integrates with nearly everything. The FR265 carries the full training stack: morning report, HRV status, training readiness, race widget, Garmin Coach adaptive plans, and daily suggested workouts that adjust after each run. COROS Training Hub is capable and considerably smaller, with fewer third-party hooks.
Music and payments. The Garmin stores music on-device and supports Garmin Pay. If you run without a phone and want either, that alone may settle it.
The Case for Saving the $250
A running watch does not make you faster. It measures. Once measurement is accurate, additional spending buys convenience and polish rather than better training, and the PACE 3 clears the accuracy bar comfortably.
At 30 grams with a nylon band and 11.7mm thick, it is also genuinely lighter and slimmer than the 46mm Garmin, which matters more than people expect on long runs and overnight wear for sleep tracking.
Then there is what $250 buys elsewhere. A quality chest strap, which fixes the accuracy problem neither wrist sensor solves. A pair of race shoes. Three or four race entries. Our honest position, labelled as editorial judgment: for a runner training for a half or full marathon on familiar roads, the PACE 3 plus a chest strap is a better setup than the FR265 alone, and it costs less.
Neither watch has a subscription, which is worth noting given how much of this category now does. Our three-year cost comparison shows how much that changes real ownership cost against WHOOP and Oura.
Where Both Watches Are Equally Limited
Wrist optical heart rate is good at rest and steady efforts and degrades as intensity rises, on both watches, because it is the same underlying technology reading blood flow through a moving wrist. In the Stanford validation of seven wearables (Journal of Personalized Medicine, 2017), no device met the researchers’ 5 percent accuracy threshold for energy expenditure, with the most accurate off by more than 27 percent.
The practical consequence is identical whichever you buy: use the trend, not the absolute number, and if you train by heart rate zones, pair it with a chest strap. That is the real accuracy upgrade at either price point, and it costs about $100. Our guide to what the validation research shows goes study by study, and our heart rate monitor roundup covers the fix.
How We Evaluate
We do not train with either watch and we will not imply we do. Specifications come from COROS’s and Garmin’s own Amazon product listings, checked in July 2026, including the dual-frequency GPS, 38-hour GPS and 24-day battery, 30g weight and 11.7mm thickness figures for the PACE 3, and the AMOLED display, 20-hour GPS, 13-day battery, training readiness and Garmin Coach features for the FR265. Prices were read live on the same date and move frequently. The explanation of how dual-frequency positioning and transflective displays work reflects established physics rather than either manufacturer’s marketing. Accuracy figures come from the Stanford wearables validation study in the Journal of Personalized Medicine. Recommendations are our judgment and labelled as such.
Who Should Buy Which
Buy the COROS PACE 3 if you run in cities or on trails where GPS accuracy actually matters, if you want the longest battery in this class, if you value light weight for long runs and overnight wear, or if $250 is better spent on shoes, races, and a chest strap. This is our pick for most runners, and the fact that it is less than half the price does not weaken that.
Buy the Garmin Forerunner 265 if you already own Garmin gear, if you want music on your wrist without a phone, if adaptive coaching and daily suggested workouts are what will keep you training, or if the screen is what has kept you away from COROS. Those are legitimate reasons and the ecosystem argument in particular gets stronger the more Garmin you own. Our Forerunner 265 review covers it in full.
Consider neither if you are new to structured training and not yet sure it will stick. A cheaper GPS watch covers the fundamentals, as our sub-$200 roundup and running watch guide both get into, and the gap between tiers is narrower than the pricing suggests.
Check COROS PACE 3 Price → Check Garmin FR265 Price →
What Neither Watch Fixes
Both watches read heart rate optically from the wrist, and that technology has the same ceiling regardless of what you paid. Accuracy is good at rest and during steady efforts, then degrades as intensity rises, because your wrist is moving hard, tendons are shifting under the sensor, and heart rate is changing fast. Some watches lag. Some latch onto your cadence and report your step rate as your pulse.
That matters most for exactly the sessions where precision counts: intervals, threshold work, and anything where you make decisions from time-in-zone. Our zone 2 training guide covers why easy running in particular gets ruined by bad heart rate data, since the whole point is staying under a ceiling you cannot feel reliably.
The fix is the same for both watches and costs about $100. A chest strap reads the heart’s electrical signal directly, the same class of signal an ECG uses, which is why published validation research routinely uses one as the reference device when assessing wrist wearables. Pair either watch with a strap and you have solved the accuracy problem that neither manufacturer can solve in a wrist sensor. Our heart rate monitor roundup covers the options.
FAQ
Is the COROS PACE 3 better than the Garmin Forerunner 265?
On GPS hardware and battery, yes, and it costs $250 less. The PACE 3 has dual-frequency GPS and up to 24 days of battery against the Garmin’s single-band positioning and 13 days. The Garmin wins on display quality, ecosystem breadth, and on-device music.
Does the Garmin Forerunner 265 have dual-frequency GPS?
No. The FR265 uses single-band positioning, which is accurate on open roads but more prone to drift between tall buildings and under tree cover. The much cheaper COROS PACE 3 includes dual-frequency reception.
Which has better battery life?
The PACE 3, by roughly double. COROS rates it at 38 hours continuous GPS and 24 days of daily use. Garmin rates the FR265 at 20 hours GPS and 13 days. The difference comes largely from the transflective versus AMOLED display.
Is the Garmin ecosystem worth the extra money?
It depends how much Garmin you already own and whether you will use adaptive coaching. Garmin Connect is free and integrates far more widely than COROS Training Hub. If you have a Garmin bike computer or a coach building plans in Connect, that pull is real.
Do either of these watches require a subscription?
No. Both COROS and Garmin provide their training platforms free, unlike WHOOP and Oura which require ongoing memberships. That makes both cheaper over three years than the sticker price comparison suggests.