Samsung - Galaxy Watch 7 (40mm) vs Withings - ScanWatch 2
Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Samsung - Galaxy Watch 7 (40mm) | Withings - ScanWatch 2 |
|---|---|---|
| Battery life | 30 h | 720 h |
| Display size | 1.31 " | 0.63 " |
| Weight | 28.8 g | 59 g |
| Cellular | true | false |
| Peak brightness | 3000 nits | 0 nits |
Between the Galaxy Watch 7 (40mm) and ScanWatch 2, the Galaxy Watch 7 (40mm) comes out ahead in display size / weight, while the ScanWatch 2 wins on battery life. Overall, the Galaxy Watch 7 (40mm) scores 69.6 and the ScanWatch 2 scores 78.3 on our Mars Score.
Which should you buy?
The ScanWatch 2 is the clear pick on raw spec strength, leading by 8.7 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 Galaxy Watch 7 (40mm) 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, among others. The single most decisive one: Display size — 107.94% more. 1.31 " vs 0.63 ".
Pick the ScanWatch 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. The single most decisive one: Battery life — 2300.00% more. 720 h vs 30 h.
Both ship with comparable ecg, spo2, water resistance, so those specs do not separate the two — focus on the differences below.
Bottom line: the ScanWatch 2 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: Samsung - Galaxy Watch 7 (40mm) or Withings - ScanWatch 2?
Withings - ScanWatch 2 leads the current Mars Score by 8.7 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 Samsung - Galaxy Watch 7 (40mm) if…
Samsung - Galaxy Watch 7 (40mm) has the measurable edge on display size in, weight g, has cellular.
Choose Withings - ScanWatch 2 if…
Withings - ScanWatch 2 has the measurable edge on battery life h.
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 Samsung - Galaxy Watch 7 (40mm) wins
- ▲Display size — 107.94% more. 1.31 " vs 0.63 ".
- ▲Weight — 30.20 g less. 28.8 vs 59.
- ▲Has Cellular.
- ▲Peak brightness: 3000 nits vs 0 nits.
Why Withings - ScanWatch 2 wins
- ▲Battery life — 2300.00% more. 720 h vs 30 h.
Spec comparison
Design
| Spec | Samsung - Galaxy Watch 7 (40mm) | Withings - ScanWatch 2 |
|---|---|---|
| Case size | 40 mm | 42 mmlead |
| Weight | 28.8 glead | 59 g |
| Case material | aluminum | stainless steel |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Samsung - Galaxy Watch 7 (40mm) | Withings - ScanWatch 2 |
|---|---|---|
| Display size | 1.31 "lead | 0.63 " |
| Always-on display | truelead | false |
| Peak brightnessⓘ | 3000 nitslead | 0 nits |
Health & Fitness
| Spec | Samsung - Galaxy Watch 7 (40mm) | Withings - ScanWatch 2 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | truelead | false |
Battery & Connectivity
| Spec | Samsung - Galaxy Watch 7 (40mm) | Withings - ScanWatch 2 |
|---|---|---|
| Battery lifeⓘ | 30 h | 720 hlead |
| GPS | truelead | false |
| Cellular | truelead | false |
| NFC | truelead | false |
| OS | WearOS | Withings OSlead |
Frequently asked
Which has longer battery life, Galaxy Watch 7 (40mm) or ScanWatch 2?+
ScanWatch 2 lasts 720 hours vs 30 hours.
Do Galaxy Watch 7 (40mm) or ScanWatch 2 support ECG?+
Both support ECG.
Which has cellular, Galaxy Watch 7 (40mm) or ScanWatch 2?+
Galaxy Watch 7 (40mm) offers a cellular variant; ScanWatch 2 is Wi-Fi only.