Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Garmin - Venu 4 | Withings - ScanWatch 2 |
|---|---|---|
| Battery life | 264 h | 720 h |
| Display size | 1.4 " | 0.63 " |
| Weight | 45 g | 59 g |
| Peak brightness | 1000 nits | 0 nits |
Between the Venu 4 and ScanWatch 2, the Venu 4 comes out ahead in display size / weight, while the ScanWatch 2 wins on battery life. Overall, the Venu 4 scores 73.6 and the ScanWatch 2 scores 78.3 on our Mars Score.
Which should you buy?
The ScanWatch 2 edges ahead on the Mars Score (73.6 vs 78.3), but the 4.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Venu 4 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are display size, weight, peak brightness. The single most decisive one: Display size — 122.22% more. 1.4 " 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 — 172.73% more. 720 h vs 264 h.
Both ship with comparable ecg, cellular, spo2, so those specs do not separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Garmin - Venu 4 or Withings - ScanWatch 2?
Withings - ScanWatch 2 leads the current Mars Score by 4.7 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 Garmin - Venu 4 if…
Garmin - Venu 4 has the measurable edge on display size in, weight g, peak brightness nits.
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 Garmin - Venu 4 wins
- ▲Display size — 122.22% more. 1.4 " vs 0.63 ".
- ▲Weight — 14.00 g less. 45 vs 59.
- ▲Peak brightness: 1000 nits vs 0 nits.
Why Withings - ScanWatch 2 wins
- ▲Battery life — 172.73% more. 720 h vs 264 h.
Spec comparison
Design
| Spec | Garmin - Venu 4 | Withings - ScanWatch 2 |
|---|---|---|
| Case size | 45 mmlead | 42 mm |
| Weight | 45 glead | 59 g |
| Case material | aluminum | stainless steel |
| Water resistanceⓘ | 5 ATM | 5 ATM |
Display
| Spec | Garmin - Venu 4 | Withings - ScanWatch 2 |
|---|---|---|
| Display size | 1.4 "lead | 0.63 " |
| Always-on display | truelead | false |
| Peak brightnessⓘ | 1000 nitslead | 0 nits |
Health & Fitness
| Spec | Garmin - Venu 4 | Withings - ScanWatch 2 |
|---|---|---|
| ECG | true | true |
| SpO2 | true | true |
| Temperature sensor | true | true |
| Sleep tracking | true | true |
| Blood pressure | false | false |
Battery & Connectivity
| Spec | Garmin - Venu 4 | Withings - ScanWatch 2 |
|---|---|---|
| Battery lifeⓘ | 264 h | 720 hlead |
| GPS | truelead | false |
| Cellular | false | false |
| NFC | truelead | false |
| OS | Garmin OS | Withings OSlead |
Frequently asked
Which has longer battery life, Venu 4 or ScanWatch 2?+
ScanWatch 2 lasts 720 hours vs 264 hours.
Do Venu 4 or ScanWatch 2 support ECG?+
Both support ECG.
Which has cellular, Venu 4 or ScanWatch 2?+
Neither offers cellular.