Between the Watch SE (2nd gen) and Venu 3, the Watch SE (2nd gen) comes out ahead in display size and weight, while the Venu 3 wins on battery life and ecg. Overall, the Watch SE (2nd gen) scores 56.1 and the Venu 3 scores 62 on our Mars Score.
Which should you buy?
The Venu 3 edges ahead on the Mars Score (56.1 vs 62), but the 5.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Watch SE (2nd gen) if you carry the device everywhere and weight or thickness has been the deciding factor before. The biggest gaps in its favor are display size, weight, cellular.
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, ecg, spo2.
Both ship with comparable water resistance, peak brightness, so those specs don't 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.
Why Apple - Watch SE (2nd gen) wins
- ▲Display size — 27.14% more. 1.78 " vs 1.4 ".
- ▲Weight — 14.00 g less. 33 vs 47.
- ▲Has Cellular.
Why Garmin - Venu 3 wins
- ▲Battery life — 1766.67% more. 336 h vs 18 h.
- ▲Has ECG.
- ▲Has SpO2.
Spec comparison
Design
| Spec | Apple - Watch SE (2nd gen) | Garmin - Venu 3 |
|---|---|---|
| Case size | 44 mm | 45 mmlead |
| Weight | 33 glead | 47 g |
| Case material | aluminum | stainless steel |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Apple - Watch SE (2nd gen) | Garmin - Venu 3 |
|---|---|---|
| Display size | 1.78 "lead | 1.4 " |
| Always-on display | false | truelead |
| Peak brightnessⓘ | 1000 nits | 1000 nits |
Health & Fitness
| Spec | Apple - Watch SE (2nd gen) | Garmin - Venu 3 |
|---|---|---|
| ECG | false | truelead |
| SpO2 | false | truelead |
| Temperature sensor | false | truelead |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Apple - Watch SE (2nd gen) | Garmin - Venu 3 |
|---|---|---|
| Battery life | 18 h | 336 hlead |
| GPS | true | true |
| Cellular | truelead | false |
| NFC | true | true |
| OS | watchOS | Garmin OSlead |
Frequently asked
Which has longer battery life, Watch SE (2nd gen) or Venu 3?+
Venu 3 lasts 336h vs 18h.
Do Watch SE (2nd gen) or Venu 3 support ECG?+
Venu 3 supports ECG; Watch SE (2nd gen) does not.
Which has cellular, Watch SE (2nd gen) or Venu 3?+
Watch SE (2nd gen) offers a cellular variant; Venu 3 is Wi-Fi only.
Spec-level deep dives
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