Garmin - Fenix 8 Solar (47mm) vs Garmin - MARQ Athlete (Gen 2)
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Garmin - Fenix 8 Solar (47mm) | Garmin - MARQ Athlete (Gen 2) |
|---|---|---|
| GPS mode | 104 h | 30 h |
| Smartwatch mode | 28 days | 16 days |
| Solar charging | true | false |
Between the Fenix 8 Solar (47mm) and MARQ Athlete (Gen 2), the Fenix 8 Solar (47mm) comes out ahead in gps mode / smartwatch mode, while the MARQ Athlete (Gen 2) wins on several specs. Overall, the Fenix 8 Solar (47mm) scores 73.5 and the MARQ Athlete (Gen 2) scores 68.1 on our Mars Score.
Which should you buy?
The Fenix 8 Solar (47mm) edges ahead on the Mars Score (73.5 vs 68.1), but the 5.4-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Fenix 8 Solar (47mm) if you care most about gps mode / smartwatch mode. The biggest gaps in its favor are gps mode, smartwatch mode, solar charging. The single most decisive one: GPS mode — 246.67% more. 104 h vs 30 h.
The MARQ Athlete (Gen 2) 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, ecg, so those specs do not separate the two — focus on the differences below.
Bottom line: the Fenix 8 Solar (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: Garmin - Fenix 8 Solar (47mm) or Garmin - MARQ Athlete (Gen 2)?
Garmin - Fenix 8 Solar (47mm) leads the current Mars Score by 5.4 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 Garmin - Fenix 8 Solar (47mm) if…
Garmin - Fenix 8 Solar (47mm) has the measurable edge on battery gps hours, battery smartwatch days, has solar.
Choose Garmin - MARQ Athlete (Gen 2) if…
Garmin - MARQ Athlete (Gen 2) 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 Garmin - Fenix 8 Solar (47mm) wins
- ▲GPS mode — 246.67% more. 104 h vs 30 h.
- ▲Smartwatch mode — 75.00% more. 28 days vs 16 days.
- ▲Has Solar charging.
Why Garmin - MARQ Athlete (Gen 2) wins
- No decisive advantages.
Spec comparison
GPS & Sensors
| Spec | Garmin - Fenix 8 Solar (47mm) | Garmin - MARQ Athlete (Gen 2) |
|---|---|---|
| Multi-band GPS | true | true |
| Barometric altimeter | true | true |
| Heart rate | true | true |
| ECG | true | true |
| Pulse Ox | true | true |
Battery
| Spec | Garmin - Fenix 8 Solar (47mm) | Garmin - MARQ Athlete (Gen 2) |
|---|---|---|
| Smartwatch mode | 28 dayslead | 16 days |
| GPS mode | 104 hlead | 30 h |
| Solar charging | truelead | false |
Design
| Spec | Garmin - Fenix 8 Solar (47mm) | Garmin - MARQ Athlete (Gen 2) |
|---|---|---|
| Case size | 47 mmlead | 46 mm |
| Weight | 82 glead | 92 g |
| Water resistanceⓘ | 10 ATM | 10 ATM |