Between the Watch SE 3 and Galaxy Watch Ultra 2, the Watch SE 3 comes out ahead in weight and display size, while the Galaxy Watch Ultra 2 wins on battery life and 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 don't 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 60h vs 18h.
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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