Between the Watch SE 3 and Venu 3, the Watch SE 3 comes out ahead in display size and weight, while the Venu 3 wins on battery life and ecg. Overall, the Watch SE 3 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 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 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 3 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 3 | 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 3 | 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 3 | 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 3 | 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 3 or Venu 3?+
Venu 3 lasts 336h vs 18h.
Do Watch SE 3 or Venu 3 support ECG?+
Venu 3 supports ECG; Watch SE 3 does not.
Which has cellular, Watch SE 3 or Venu 3?+
Watch SE 3 offers a cellular variant; Venu 3 is Wi-Fi only.
Spec-level deep dives
More from the same brands
vsMars is reader-supported. When you buy through links on our site, we may earn an affiliate commission at no extra cost to you. Learn more.