Between the Watch SE 3 and Venu 4, the Watch SE 3 comes out ahead in display size / weight, while the Venu 4 wins on battery life / ecg. Overall, the Watch SE 3 scores 56.1 and the Venu 4 scores 58.5 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (56.1 vs 58.5). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the Watch SE 3 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 4 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 do not 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 says both are well-rounded; the differences are about trade-offs, not quality.
Why Apple - Watch SE 3 wins
- ▲Display size — 27.14% more. 1.78 " vs 1.4 ".
- ▲Weight — 12.00 g less. 33 vs 45.
- ▲Has Cellular.
Why Garmin - Venu 4 wins
- ▲Battery life — 1366.67% more. 264 h vs 18 h.
- ▲Has ECG.
- ▲Has SpO2.
Spec comparison
Design
| Spec | Apple - Watch SE 3 | Garmin - Venu 4 |
|---|---|---|
| Case size | 44 mm | 45 mmlead |
| Weight | 33 glead | 45 g |
| Case material | aluminum | aluminum |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Apple - Watch SE 3 | Garmin - Venu 4 |
|---|---|---|
| Display size | 1.78 "lead | 1.4 " |
| Always-on display | false | truelead |
| Peak brightnessⓘ | 1000 nits | 1000 nits |
Health & Fitness
| Spec | Apple - Watch SE 3 | Garmin - Venu 4 |
|---|---|---|
| ECG | false | truelead |
| SpO2 | false | truelead |
| Temperature sensor | false | truelead |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Apple - Watch SE 3 | Garmin - Venu 4 |
|---|---|---|
| Battery life | 18 h | 264 hlead |
| GPS | true | true |
| Cellular | truelead | false |
| NFC | true | true |
| OS | watchOS | Garmin OSlead |
Frequently asked
Which has longer battery life, Watch SE 3 or Venu 4?+
Venu 4 lasts 264 hours vs 18 hours.
Do Watch SE 3 or Venu 4 support ECG?+
Venu 4 supports ECG; Watch SE 3 does not.
Which has cellular, Watch SE 3 or Venu 4?+
Watch SE 3 offers a cellular variant; Venu 4 is Wi-Fi only.
Spec-level deep dives
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