Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Polar - Vantage V3 | Garmin - Venu 3 |
|---|---|---|
| Battery life | 168 h | 336 h |
| Weight | 57 g | 47 g |
| Display size | 1.39 " | 1.4 " |
Between the Vantage V3 and Venu 3, the Vantage V3 comes out ahead in several specs, while the Venu 3 wins on battery life / weight. Overall, the Vantage V3 scores 69.2 and the Venu 3 scores 74.9 on our Mars Score.
Which should you buy?
The Venu 3 edges ahead on the Mars Score (69.2 vs 74.9), but the 5.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
The Vantage V3 does not pull ahead on any single popular-comparison spec — its strengths sit in the spec-table groups rather than the headline advantages.
Pick the Venu 3 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, weight, display size. The single most decisive one: Battery life — 100.00% more. 336 h vs 168 h.
Both ship with comparable ecg, cellular, spo2, so those specs do not separate the two — focus on the differences below.
Bottom line: the Venu 3 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: Polar - Vantage V3 or Garmin - Venu 3?
Garmin - Venu 3 leads the current Mars Score by 5.7 points.The more useful decision is the trade-off behind that result: compare display size, battery life against the way you will actually use the product.
Choose Polar - Vantage V3 if…
Polar - Vantage V3 does not lead a decisive measured field here, so choose it for price, ecosystem, design, or availability when those matter more to you.
Choose Garmin - Venu 3 if…
Garmin - Venu 3 has the measurable edge on battery life h, weight g, display size in.
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 Polar - Vantage V3 wins
- No decisive advantages.
Why Garmin - Venu 3 wins
- ▲Battery life — 100.00% more. 336 h vs 168 h.
- ▲Weight — 10.00 g less. 47 vs 57.
- ▲Display size — 0.72% more. 1.4 " vs 1.39 ".
Spec comparison
Design
| Spec | Polar - Vantage V3 | Garmin - Venu 3 |
|---|---|---|
| Case size | 47 mmlead | 45 mm |
| Weight | 57 g | 47 glead |
| Case material | aluminum | stainless steel |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Polar - Vantage V3 | Garmin - Venu 3 |
|---|---|---|
| Display size | 1.39 " | 1.4 "lead |
| Always-on display | true | true |
| Peak brightnessⓘ | 1000 nits | 1000 nits |
Health & Fitness
| Spec | Polar - Vantage V3 | Garmin - Venu 3 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Polar - Vantage V3 | Garmin - Venu 3 |
|---|---|---|
| Battery lifeⓘ | 168 h | 336 hlead |
| GPS | true | true |
| Cellular | false | false |
| NFC | false | truelead |
| OS | Polar OSlead | Garmin OS |
Frequently asked
Which has longer battery life, Vantage V3 or Venu 3?+
Venu 3 lasts 336 hours vs 168 hours.
Do Vantage V3 or Venu 3 support ECG?+
Both support ECG.
Which has cellular, Vantage V3 or Venu 3?+
Neither offers cellular.