Apple - Watch Series 10 (46mm) vs Samsung - Galaxy Watch Ultra 2
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Apple - Watch Series 10 (46mm) | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| Battery life | 18 h | 60 h |
| Peak brightness | 2000 nits | 3000 nits |
| Display size | 2.04 " | 1.5 " |
| Weight | 36.4 g | 60 g |
| Water resistance | 5 ATM | 10 ATM |
Between the Watch Series 10 (46mm) and Galaxy Watch Ultra 2, the Watch Series 10 (46mm) comes out ahead in display size / weight, while the Galaxy Watch Ultra 2 wins on battery life / peak brightness. Overall, the Watch Series 10 (46mm) scores 76.9 and the Galaxy Watch Ultra 2 scores 67.5 on our Mars Score.
Which should you buy?
The Watch Series 10 (46mm) is the clear pick on raw spec strength, leading by 9.4 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Watch Series 10 (46mm) 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. The single most decisive one: Display size — 36.00% more. 2.04 " vs 1.5 ".
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. The single most decisive one: Battery life — 233.33% more. 60 h vs 18 h.
Both ship with comparable ecg, cellular, spo2, so those specs do not separate the two — focus on the differences below.
Bottom line: the Watch Series 10 (46mm) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: Apple - Watch Series 10 (46mm) or Samsung - Galaxy Watch Ultra 2?
Apple - Watch Series 10 (46mm) leads the current Mars Score by 9.4 points.The more useful decision is the trade-off behind that result: compare display size, battery life against the way you will actually use the product.
Choose Apple - Watch Series 10 (46mm) if…
Apple - Watch Series 10 (46mm) has the measurable edge on display size in, weight g.
Choose Samsung - Galaxy Watch Ultra 2 if…
Samsung - Galaxy Watch Ultra 2 has the measurable edge on battery life h, peak brightness nits, water resistance atm.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why Apple - Watch Series 10 (46mm) wins
- ▲Display size — 36.00% more. 2.04 " vs 1.5 ".
- ▲Weight — 23.60 g less. 36.4 vs 60.
Why Samsung - Galaxy Watch Ultra 2 wins
- ▲Battery life — 233.33% more. 60 h vs 18 h.
- ▲Peak brightness — 50.00% more. 3000 nits vs 2000 nits.
- ▲Water resistance — 5.00 ATM more. 10 vs 5.
Spec comparison
Design
| Spec | Apple - Watch Series 10 (46mm) | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| Case size | 46 mm | 47 mmlead |
| Weight | 36.4 glead | 60 g |
| Case material | aluminum | titanium |
| Water resistanceⓘ | 5 ATM | 10 ATMlead |
Display
| Spec | Apple - Watch Series 10 (46mm) | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| Display size | 2.04 "lead | 1.5 " |
| Always-on display | true | true |
| Peak brightnessⓘ | 2000 nits | 3000 nitslead |
Health & Fitness
| Spec | Apple - Watch Series 10 (46mm) | Samsung - Galaxy Watch Ultra 2 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | truelead |
Battery & Connectivity
| Spec | Apple - Watch Series 10 (46mm) | 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 Series 10 (46mm) or Galaxy Watch Ultra 2?+
Galaxy Watch Ultra 2 lasts 60 hours vs 18 hours.
Do Watch Series 10 (46mm) or Galaxy Watch Ultra 2 support ECG?+
Both support ECG.
Which has cellular, Watch Series 10 (46mm) or Galaxy Watch Ultra 2?+
Both offer cellular variants.