Garmin Forerunner 570 vs COROS PACE 4

The specification table

Every value below is the maker's own published figure, re-read from the Garmin Forerunner 570 product page and the COROS PACE 4 product page on the date at the top of this article. Where one maker does not publish a row, the cell says so — we do not fill it with a number from a review, a forum or the other watch.

What both watches record, from their own pages

The two spec sheets overlap more than the price gap suggests. COROS states the PACE 4 calculates VO2 max, lactate threshold and a running fitness level, supports running power-based plans and structured intervals, syncs routes from Strava, RidewithGPS and Wikiloc for breadcrumb navigation, and pushes workouts in from TrainingPeaks and Final Surge. Garmin states the 570 has lactate threshold, training load, training status and readiness, HRV status, running dynamics with vertical oscillation and ground contact time, PacePro pacing, and Bluetooth, ANT+ and Wi-Fi connectivity with Connect IQ on top.

Every one of those is a manufacturer feature list, and none of it tells you whether the number the watch produces is right. Both watches estimate the same physiology from the same kind of wrist sensor, so the coverage row is close to a tie; the data-quality row is a tie too, for a worse reason, which the evidence section below explains.

The battery headline compares two different modes

The number that gets quoted is 41 hours against 18. It is not a like-for-like row, and this is the single most useful thing on this page. COROS's 41 hours is an All-Systemsfigure — every constellation, single frequency. Garmin's 18 hours is a GPS-Only figure — one constellation, single frequency, the least demanding mode the watch has. Garmin does not publish a plain All-Systems figure for the 570 at all; its nearest row is SatIQ, which lets the watch choose its own mode, at 16 hours.

Then there is the mode you would actually run if positioning accuracy is why you bought a dual-frequency watch. Garmin publishes it: 14 hours in All-Systems + Multi-Band on the 47 mm case, 13 on the 42 mm. COROS does not publish a dual-frequency battery figure for the PACE 4 on the page we read — it publishes one for the PACE Pro(31 hours) and not for this watch. So the honest comparison of accurate-mode endurance is 14 hours against a blank, and we would rather print the blank than borrow the Pro's number.

None of that makes the PACE 4's battery a marketing trick. Its stated daily-use figure is 19 days against 11, which isthe same kind of row on both sides, and the All-Systems figure is more than double Garmin's GPS-only one despite being the harder mode. The COROS is the longer-lived watch by every row both makers publish. The point is that the margin in the mode that matters is unknown, because one side has not said.

What the cost-per-GPS-hour arithmetic says, and what it hides

This site divides the live Amazon price by the maker's stated GPS hours and prints the result. Today that gives the PACE 4 at $6.07 per stated GPS hour and the Forerunner 570 at $30.33. Two things to know before you read those as a verdict. First, the mode named in each figure is different, for the reason above — hover either number and it tells you which. Second, both numbers move with the live price, so if a sale closes the gap, the arithmetic follows it.

Even with those caveats, the gap is not close. The price difference alone is $297 today, which is roughly the cost of a second PACE 4, or of a Polar H10 with a great deal left over — and the strap is the one purchase that would change what either watch measures.

What the extra money actually buys

Read the table honestly and the Forerunner 570's case is real, it is just not about data. Here is the list, in the order we think most buyers would rank it.

• A larger, sharper screen. 1.4 inches at 454 × 454 against 1.2 inches. On a watch you glance at mid-interval, that is a genuine daily difference — and the 42 mm 570 gives most of it back, at 1.2 inches and 390 × 390.
• A speaker. Calls and a voice assistant from the wrist with a phone paired. The PACE 4 has a microphone for voice notes and media controls; it has no speaker listed.
• On-watch music. 8 GB of memory, with Garmin publishing the battery cost of using it: 9, 8 and 8 hours by mode. The PACE 4 page lists media controls for a phone and no storage figure.
• The Garmin ecosystem.Connect IQ, the third-party app and data-field catalog, and the broadest set of integrations in the category. COROS's ecosystem is narrower, which is a real cost if you already live in Garmin's.
• A published multi-band battery figure. Not a feature, but it is something you are buying: Garmin tells you what the accurate mode costs. COROS, for this model, does not.

What the extra money does not buy is maps — neither watch has them, and if that is what you are shopping for the decision moves to the 570 against the Forerunner 965 or the PACE 4 against the PACE Pro. It also does not buy a validated sensor, which brings us to the part of the table that neither maker wants to be the headline.

The evidence position, and why it is a tie at the bottom

Nobody has independently measured the Forerunner 570's optical heart rate, its GPS distance or its threshold estimates in anything we can cite. Nobody has done that for the PACE 4 either. Under our evidence hierarchyboth watches sit on manufacturer specification alone, and that is where the rubric's largest weight lands: the 570 scores 5.5 on evidence, the PACE 4 scores 4.5, and the difference is not a measurement of either watch. It is the previous COROS.

The nearest measured neighbors are instructive rather than reassuring. The5krunner's independent heart-rate comparison of the PACE 3 found its wrist reading diverged during and after rapid intensity changes — exactly the intervals you would buy a training watch for — on a dataset its author called limited. Then, in 2025, a laboratory study of smartwatch threshold estimates against fingertip blood lactate put both brands' mid-range models on the same treadmill. The COROS PACE 3 returned a usable threshold result 47.1% of the time (8 of 17 attempts) and its threshold-pace estimate carried a mean error of 22.63%, overestimating. The Garmin Forerunner 265 returned a result 65.2% of the time (15 of 23) with a threshold-pace error of 25.78%, also overestimating. Neither is the watch on this page; both are the closest thing to it that anyone has tested, and neither did well.

COROS states the PACE 4's sensor is redesigned, with larger LEDs and a more secure fit. That is a manufacturer claim and we label it as one — nobody has tested it. It is worth noticing that COROS's own product page, in the same paragraph, suggests pairing "an external Bluetooth heart rate strap for even higher precision." We agree, on both watches. The wrist-versus-strap evidence is the best-measured thing in this whole category, and it says the strap is the upgrade regardless of which wrist device you put it next to.

Weight and fit, which are the other half of the sensor question

Thirty-two grams against fifty is the biggest physical gap between these two, and it is the specification you feel on every run. Over a long day the lighter watch simply disappears; the heavier one is always a watch. Choose the 42 mm Garmin and the gap narrows to 42 grams against 32, with a smaller screen and one hour less multi-band battery.

There is a second-order reason to care. Optical heart-rate sensing depends on the sensor staying still against skin, and a lighter watch on a snug band moves less. That is a mechanism argument, not a measured one — no study we have read isolates watch mass as a variable — and we flag it as such. What has been measured is placement, and it says the same thing louder: a stable sensor beats a wrist sensor of any weight.

Who should buy which

• Most runners, most of the time. The PACE 4. Lighter, more stated hours in every row both makers publish, dual-frequency positioning, and about half the money — which pays for the strap that fixes its only documented weakness.
• You want calls from the wrist, music without a phone, or you already train inside Garmin Connect. The Forerunner 570. Those are real things, they are published, and the PACE 4 does not have them.
• You are choosing on positioning accuracy. Either, with a caveat: both have dual-frequency receivers, and nobody has validated dual-band accuracy on a consumer watch. Garmin at least tells you what the mode costs in hours; COROS, on this model, does not.
• You want a measured sensor. Neither, on its own. Pair a chest strap with whichever you buy, and the wrist sensor stops mattering.

Why this is not the same decision as COROS vs Garmin

The brand-level comparisonresolves each tier separately, and at the mid-range it sets the PACE 4 against the Forerunner 970, because that is where the cost-per-GPS-hour gap is widest. This page is the narrower question a buyer actually types: the 570 is the Garmin that shares the PACE 4's AMOLED screen, its no-maps position and its mid-range intent, so it is the fairer fight — and the Forerunner still loses on every published endurance row while winning on every published feature row. That split, rather than a blanket verdict, is what the two spec sheets say.