Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Coros - Apex 2 | Garmin - Fenix 8 CE (47mm) |
|---|---|---|
| GPS mode | 45 h | 84 h |
| Smartwatch mode | 17 days | 16 days |
| Multi-band GPS | false | true |
| ECG | false | true |
Between the Apex 2 and Fenix 8 CE (47mm), the Apex 2 comes out ahead in smartwatch mode, while the Fenix 8 CE (47mm) wins on gps mode / multi-band gps. Overall, the Apex 2 scores 46.1 and the Fenix 8 CE (47mm) scores 70.6 on our Mars Score.
Which should you buy?
The Fenix 8 CE (47mm) is the clear pick on raw spec strength, leading by 24.5 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Apex 2 if you care most about smartwatch mode. The biggest gaps in its favor are smartwatch mode. The single most decisive one: Smartwatch mode — 6.25% more. 17 days vs 16 days.
Pick the Fenix 8 CE (47mm) if you care most about gps mode / multi-band gps. Its strongest claims are gps mode, multi-band gps, ecg. The single most decisive one: GPS mode — 86.67% more. 84 h vs 45 h.
Both ship with comparable solar charging, so those specs do not separate the two — focus on the differences below.
Bottom line: the Fenix 8 CE (47mm) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Coros - Apex 2 or Garmin - Fenix 8 CE (47mm)?
Garmin - Fenix 8 CE (47mm) leads the current Mars Score by 24.5 points.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 - Apex 2 if…
Coros - Apex 2 has the measurable edge on battery smartwatch days.
Choose Garmin - Fenix 8 CE (47mm) if…
Garmin - Fenix 8 CE (47mm) has the measurable edge on battery gps hours, has multiband gps, has ecg.
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 - Apex 2 wins
- ▲Smartwatch mode — 6.25% more. 17 days vs 16 days.
Why Garmin - Fenix 8 CE (47mm) wins
- ▲GPS mode — 86.67% more. 84 h vs 45 h.
- ▲Has Multi-band GPS.
- ▲Has ECG.
Spec comparison
GPS & Sensors
| Spec | Coros - Apex 2 | Garmin - Fenix 8 CE (47mm) |
|---|---|---|
| Multi-band GPS | false | truelead |
| Barometric altimeter | true | true |
| Heart rate | true | true |
| ECG | false | truelead |
| Pulse Ox | true | true |
Battery
| Spec | Coros - Apex 2 | Garmin - Fenix 8 CE (47mm) |
|---|---|---|
| Smartwatch mode | 17 dayslead | 16 days |
| GPS mode | 45 h | 84 hlead |
| Solar charging | false | false |
Design
| Spec | Coros - Apex 2 | Garmin - Fenix 8 CE (47mm) |
|---|---|---|
| Case size | 43 mm | 47 mmlead |
| Weight | 53 glead | 80 g |
| Water resistanceⓘ | 5 ATM | 10 ATMlead |