Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Coros - PACE 3 | Suunto - Ocean |
|---|---|---|
| Smartwatch mode | 17 days | 10 days |
| GPS mode | 38 h | 30 h |
Between the PACE 3 and Ocean, the PACE 3 comes out ahead in smartwatch mode / gps mode, while the Ocean wins on several specs. Overall, the PACE 3 scores 71.4 and the Ocean scores 71.4 on our Mars Score.
Which should you buy?
These two are evenly matched on the broad strokes; the decision sits on which individual spec advantages weigh more for your use.
Pick the PACE 3 if you care most about smartwatch mode / gps mode. The biggest gaps in its favor are smartwatch mode, gps mode. The single most decisive one: Smartwatch mode — 70.00% more. 17 days vs 10 days.
The Ocean similarly does not carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable multi-band gps, solar charging, ecg, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Coros - PACE 3 or Suunto - Ocean?
The two products are effectively tied on the current Mars Score.The more useful decision is the trade-off behind that result: compare smartwatch mode, gps mode against the way you will actually use the product.
Choose Coros - PACE 3 if…
Coros - PACE 3 has the measurable edge on battery smartwatch days, battery gps hours.
Choose Suunto - Ocean if…
Suunto - Ocean does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Coros - PACE 3 wins
- ▲Smartwatch mode — 70.00% more. 17 days vs 10 days.
- ▲GPS mode — 26.67% more. 38 h vs 30 h.
Why Suunto - Ocean wins
- No decisive advantages.
Spec comparison
GPS & Sensors
| Spec | Coros - PACE 3 | Suunto - Ocean |
|---|---|---|
| Multi-band GPS | true | true |
| Barometric altimeter | true | true |
| Heart rate | true | true |
| ECG | false | false |
| Pulse Ox | true | true |
Battery
| Spec | Coros - PACE 3 | Suunto - Ocean |
|---|---|---|
| Smartwatch mode | 17 dayslead | 10 days |
| GPS mode | 38 hlead | 30 h |
| Solar charging | false | false |
Design
| Spec | Coros - PACE 3 | Suunto - Ocean |
|---|---|---|
| Case size | 42 mm | 49 mmlead |
| Weight | 39 glead | 78 g |
| Water resistanceⓘ | 5 ATM | 30 ATMlead |