The Withings ScanWatch 2 (Mars Score 78.3, the highest in our smartwatches catalog) beats the Apple Watch Series 10 46mm (76.9) despite looking nothing like a typical smartwatch — it's a hybrid analog watch with a 0.63" secondary display, not a full touchscreen. The two trade wins across almost every spec; battery life is what tips the balance.
Battery life is not close
The ScanWatch 2 lists 720 hours (30 days) of battery life; the Series 10 lists 18 hours. That's a roughly 40x difference, driven by fundamentally different hardware: the ScanWatch 2 uses a small always-off secondary display and no full-color touchscreen, while the Series 10 runs a full always-on OLED smartwatch interface that needs charging nightly. If you want a smartwatch you charge on a fixed daily routine, the Series 10's 18 hours is normal for the category; if you want to forget about charging for weeks, nothing in our catalog beats the ScanWatch 2's number.
Display size and brightness clearly favor the Series 10
The Series 10 has a 2.04" always-on display at 2,000 nits peak brightness; the ScanWatch 2's secondary display is 0.63" and not always-on. If you want to interact with apps, read full notifications, or use the watch as a primary display for anything beyond step counts and heart rate, the Series 10 is built for that and the ScanWatch 2 explicitly is not — it's designed to look like a normal analog watch first.
Weight and case size favor the Series 10 too
The Series 10 is lighter at 36.4 g versus the ScanWatch 2's 59 g, and both are reasonably sized at 46 mm and 42 mm respectively. The ScanWatch 2's stainless-steel case and analog hands add weight a digital-only case avoids.
Health sensors: both list ECG, cellular and GPS split the difference
Both watches list ECG support. The Series 10 additionally lists GPS and cellular — real functional advantages for outdoor tracking and phone-free connectivity that the ScanWatch 2's catalog entry doesn't share. Neither watch lists blood-pressure monitoring in our catalog.
Why the ScanWatch 2 still scores higher overall
Mars Score for smartwatches splits weight across health (32%), battery & connectivity (30%), display (22%), and design (16%). Both watches tie on health (both list ECG). The Series 10 wins display and design outright — its bigger, brighter always-on screen and lighter case both score higher on this category's normalized scales. But battery life sits in the 30%-weighted battery & connectivity group, and the ScanWatch 2's 720 hours normalizes to essentially the top of the category's scale while the Series 10's 18 hours sits near the bottom — a gap large enough in the second-heaviest group to outweigh the Series 10's wins in the smaller display and design groups.
Who should buy which
- Withings ScanWatch 2 — if you want a watch that looks like a normal analog watch, tracks ECG/SpO2/sleep reliably, and you'd rather charge once a month than once a day.
- Apple Watch Series 10 — if you want a full smartwatch experience — apps, always-on color display, GPS, cellular — and don't mind a nightly charge as the cost of that.
- Neither, if multi-day GPS tracking for outdoor sports is your priority — see our best smartwatches guide for GPS-focused sports watches instead.
What we're not claiming
This comparison is built from the manufacturer-published specifications in our catalog — battery-life hours, display size and brightness, case dimensions, weight, and sensor flags — plus general reasoning about what those differences typically mean day to day. We have not run either watch through a multi-day battery drain, a GPS-accuracy course, or a heart-rate-versus-chest-strap trial. If you need that kind of measured data, look for a review that has actually worn both watches over time.
See the full Withings ScanWatch 2 vs Apple Watch Series 10 spec comparison, or browse the smartwatches category ranked by Mars Score.
Turn this reading into a better product decision
This buying guide is a decision framework, not a substitute for checking the exact variant, regional price, availability, and warranty that apply to you. Use the linked catalog data to separate published facts from personal priorities, then compare the final shortlist directly rather than relying on a generic ranking.
Verify the fit
Open the Smartwatches category page to filter the relevant field, then inspect full product profiles and the score methodology.
Keep the recommendation current
This article references 2 catalog products; use the live product pages for current specifications and comparison links.
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