Garmin - vívoactive 5 vs Polar - Vantage V3

These two are nearly even on the Mars Score (53.3 vs 53.5). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.

Pick the vívoactive 5 if your top frustration with your current device is running out of charge before the day ends — endurance is the lead spec here. The biggest gaps in its favor are battery life, weight.

Pick the Vantage V3 if you care most about display size and ecg. Its strongest claims are display size, ecg.

Both ship with comparable cellular, 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.