Apple - Watch Ultra 2 vs Garmin - Fenix 8 (47mm)

The Fenix 8 (47mm) edges ahead on the Mars Score (60.5 vs 64.3), but the 3.8-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the Watch Ultra 2 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are peak brightness, display size, weight, among others.

Pick the Fenix 8 (47mm) if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. Its strongest claims are battery life.

Both ship with comparable ecg, spo2, water resistance, so those specs don't 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 tells you both are well-rounded; the differences are about trade-offs, not quality.