Coros Pace 4 Pro vs Suunto Race 3S
On paper, the Pace 4 Pro is the better value: it's $150 cheaper and adds a speaker, ECG, a brighter screen, and slightly more battery. The Race 3S is the more compact watch and brings Suunto's AI Coach and ZoneSense.
CorosCoros Pace 4 Pro
SuuntoSuunto Race 3S
- •You want the most features for the money, including calls and ECG, for $150 less
- •You want slightly more battery and a 3,500-nit screen
- •You want a smaller 46mm case instead of 48mm
- •You prefer Suunto's ecosystem, AI Coach, and ZoneSense
The Pace 4 Pro takes everything that made the Pace 4 popular, dual-band GPS, EvoLab's full training suite, a genuinely light build, and adds the two features Coros has never offered before: a real ECG sensor and a built-in speaker for hands-free calls. A titanium bezel, sapphire glass, and a much brighter 3,500-nit display round out the jump. It still skips NFC payments and streaming music, and at 5 ATM it's not meant for diving, but at $449 it's undercutting Garmin's closest ECG-capable rival by $300.
The Race 3S takes everything that made the Race S a hit for smaller wrists and upgrades nearly all of it: a titanium bezel and sapphire glass, a 2,000-nit AMOLED display (up from 600), 38 hours of dual-band GPS (up from 30), 64GB of storage for free global offline maps, and Suunto's new AI Coach. The watch head weighs just 38 grams. It still skips a speaker, ECG, and NFC payments, and at $599 it costs a lot more than the Race S it replaces.
Two Light, Premium Running Watches
The Coros Pace 4 Pro and Suunto Race 3S are aimed at the same runner: someone who wants a light watch with premium materials, a bright screen, and serious training data. Both have titanium bezels, sapphire glass, AMOLED screens, dual-band GPS, and offline maps.
But there's a big price gap. The Pace 4 Pro lists at $449, and the Race 3S lists at $599.
Features: The Pace 4 Pro Has More
This is where the Coros pulls ahead.
Speaker and calls. The Pace 4 Pro has a built-in speaker and microphone. The Race 3S doesn't.
ECG. The Pace 4 Pro has an ECG sensor. The Race 3S doesn't.
Screen brightness. The Pace 4 Pro peaks at 3,500 nits, compared to 2,000 on the Race 3S. Both are very bright, but the Coros is brighter.
Battery. The Pace 4 Pro is rated for 40 hours of GPS, compared to 38 on the Race 3S. That's close enough that you won't notice much difference.
For $150 less, that's a lot of extra watch.
Where the Race 3S Wins
Size. The Race 3S has a 46mm case, compared to 48mm on the Pace 4 Pro. If you have smaller wrists, that 2mm matters, and the Race 3S is built specifically to be compact.
Suunto's training tools. The Race 3S launches with Suunto's AI Coach, which gives you conversational coaching in the app, and ZoneSense, which estimates your intensity zones when paired with a chest strap. Coros's EvoLab is excellent too, with strong training load and race prediction tools, so this one comes down to which ecosystem you prefer.
Storage. The Race 3S has 64GB for maps and, after an update, music.
Which One Should You Buy?
Get the Coros Pace 4 Pro if you want the most features for your money. A speaker, ECG, a brighter screen, and a lower price make it the better value for most runners.
Get the Suunto Race 3S if you want a smaller watch or prefer Suunto's ecosystem and AI Coach.
Want more on the Coros? Read our full Coros Pace 4 Pro review, or see how it stacks up against the Garmin Forerunner 570.
Frequently Asked Questions
Is the Coros Pace 4 Pro better than the Suunto Race 3S?
On features and price, the Pace 4 Pro has the edge. It's $150 cheaper and adds a speaker, ECG, and a brighter screen. The Race 3S is more compact, at 46mm vs 48mm, and has Suunto's AI Coach.
Does the Suunto Race 3S have ECG?
No. The Coros Pace 4 Pro has an ECG sensor, but the Suunto Race 3S does not.
Which has better battery, the Pace 4 Pro or Race 3S?
They're close. The Pace 4 Pro is rated for 40 hours of GPS and the Race 3S for up to 38 hours of dual-band GPS.
Do both have titanium and sapphire?
Yes. Both the Coros Pace 4 Pro and the Suunto Race 3S have titanium bezels and sapphire glass.
*Estimated — this model's exact GPS battery life isn't published by the manufacturer. All figures are standard GPS mode, midsize case, no solar boost.
†Estimated — this model launched too recently to have an established customer rating yet.
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