Garmin - Fenix 8 Solar (47mm) vs Suunto - Vertical Titanium Solar
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) | Suunto - Vertical Titanium Solar |
|---|---|---|
| Smartwatch mode | 28 days | 60 days |
| GPS mode | 104 h | 85 h |
| ECG | true | false |
Between the Fenix 8 Solar (47mm) and Vertical Titanium Solar, the Fenix 8 Solar (47mm) comes out ahead in gps mode / ecg, while the Vertical Titanium Solar wins on smartwatch mode. Overall, the Fenix 8 Solar (47mm) scores 73.5 and the Vertical Titanium Solar scores 80 on our Mars Score.
Which should you buy?
The Vertical Titanium Solar edges ahead on the Mars Score (73.5 vs 80), but the 6.5-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 / ecg. The biggest gaps in its favor are gps mode, ecg. The single most decisive one: GPS mode — 22.35% more. 104 h vs 85 h.
Pick the Vertical Titanium Solar if you care most about smartwatch mode. Its strongest claims are smartwatch mode. The single most decisive one: Smartwatch mode — 114.29% more. 60 days vs 28 days.
Both ship with comparable multi-band gps, solar charging, so those specs do not separate the two — focus on the differences below.
Bottom line: the Vertical Titanium Solar 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 Suunto - Vertical Titanium Solar?
Suunto - Vertical Titanium Solar leads the current Mars Score by 6.5 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 Garmin - Fenix 8 Solar (47mm) if…
Garmin - Fenix 8 Solar (47mm) has the measurable edge on battery gps hours, has ecg.
Choose Suunto - Vertical Titanium Solar if…
Suunto - Vertical Titanium Solar has the measurable edge on battery smartwatch days.
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 — 22.35% more. 104 h vs 85 h.
- ▲Has ECG.
Why Suunto - Vertical Titanium Solar wins
- ▲Smartwatch mode — 114.29% more. 60 days vs 28 days.
Spec comparison
GPS & Sensors
| Spec | Garmin - Fenix 8 Solar (47mm) | Suunto - Vertical Titanium Solar |
|---|---|---|
| Multi-band GPS | true | true |
| Barometric altimeter | true | true |
| Heart rate | true | true |
| ECG | truelead | false |
| Pulse Ox | true | true |
Battery
| Spec | Garmin - Fenix 8 Solar (47mm) | Suunto - Vertical Titanium Solar |
|---|---|---|
| Smartwatch mode | 28 days | 60 dayslead |
| GPS mode | 104 hlead | 85 h |
| Solar charging | true | true |
Design
| Spec | Garmin - Fenix 8 Solar (47mm) | Suunto - Vertical Titanium Solar |
|---|---|---|
| Case size | 47 mm | 49 mmlead |
| Weight | 82 g | 74 glead |
| Water resistanceⓘ | 10 ATM | 10 ATM |