Between the Watch SE 3 and Galaxy Watch Ultra 2, the Watch SE 3 comes out ahead in weight / display size, while the Galaxy Watch Ultra 2 wins on battery life / peak brightness. Overall, the Watch SE 3 scores 56.1 and the Galaxy Watch Ultra 2 scores 50.8 on our Mars Score.
Which should you buy?
The Watch SE 3 edges ahead on the Mars Score (56.1 vs 50.8), but the 5.3-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 weight, display size.
Pick the Galaxy Watch Ultra 2 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, peak brightness, water resistance, among others.
Both ship with comparable cellular, so those specs do not separate the two — focus on the differences below.
Bottom line: the Watch SE 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
- ▲Weight — 27.00 g less. 33 vs 60.
- ▲Display size — 18.67% more. 1.78 " vs 1.5 ".
Why Samsung - Galaxy Watch Ultra 2 wins
- ▲Battery life — 233.33% more. 60 h vs 18 h.
- ▲Peak brightness — 200.00% more. 3000 nits vs 1000 nits.
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
- ▲Has ECG.
- ▲Has SpO2.
Spec comparison
Design
| Spec | Apple - Watch SE 3 | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| Case size | 44 mm | 47 mmlead |
| Weight | 33 glead | 60 g |
| Case material | aluminum | titanium |
| Water resistanceⓘ | 5 ATM | 10 ATMlead |
Display
| Spec | Apple - Watch SE 3 | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| Display size | 1.78 "lead | 1.5 " |
| Always-on display | false | truelead |
| Peak brightnessⓘ | 1000 nits | 3000 nitslead |
Health & Fitness
| Spec | Apple - Watch SE 3 | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| ECG | false | truelead |
| SpO2 | false | truelead |
| Temperature sensor | false | truelead |
| Sleep tracking | true | true |
| Blood pressure | false | truelead |
Battery & Connectivity
| Spec | Apple - Watch SE 3 | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| Battery life | 18 h | 60 hlead |
| GPS | true | true |
| Cellular | true | true |
| NFC | true | true |
| OS | watchOS | WearOSlead |
Frequently asked
Which has longer battery life, Watch SE 3 or Galaxy Watch Ultra 2?+
Galaxy Watch Ultra 2 lasts 60 hours vs 18 hours.
Do Watch SE 3 or Galaxy Watch Ultra 2 support ECG?+
Galaxy Watch Ultra 2 supports ECG; Watch SE 3 does not.
Which has cellular, Watch SE 3 or Galaxy Watch Ultra 2?+
Both offer cellular variants.
Spec-level deep dives
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