Samsung
Galaxy Watch 9 40mm vs Xiaomi Watch S4 41mm
Device summary
Xiaomi
Xiaomi Watch S4 41mm
Full specifications
| Basic information | ||
|---|---|---|
| Release year | 2026 | 2025 |
| Starting price | — | — |
| Display size | 1.3-inch | 1.3-inch |
| Dimensions | 40.4 mm × 42.7 mm × 8.6 mm | 41.2 mm × 41.2 mm × 9.5 mm |
| Weight | 32 g | 32 g |
| Front material | Sapphire crystal | — |
| Back material | — | — |
| Display | ||
| Display technology | Super AMOLED | AMOLED |
| Resolution | 438 × 438 | 466 × 466 |
| Peak brightness | 3000 nits | — |
| Protection | Sapphire crystal | — |
| Performance | ||
| Chipset | Qualcomm Snapdragon Wear Elite (SDW6100) | — |
| RAM | 2 GB | — |
| Storage | 32 GB | — |
| Expandable storage | No | No |
| Battery & charging | ||
| Battery capacity | 390 mAh | — |
| Charging standard | Wireless charging (WPC) with Fast Charging | Magnetic charging dock |
| Battery type | Lithium-ion | Lithium-ion polymer |
| Connectivity | ||
| Cellular | LTE (optional models), Dual-frequency GPS (L1+L5) | GPS / multi-GNSS |
| Wi‑Fi | Wi‑Fi 6 | — |
| Bluetooth | Bluetooth 6.0 | Bluetooth |
| NFC | Yes | Yes |
| Build & durability | ||
| Frame | Aluminum | — |
| Ingress protection | 5ATM / IP68 / MIL-STD-810H | 5 ATM |
Basic information
Release year
- Galaxy Watch 9 40mm
- 2026
- Xiaomi Watch S4 41mm
- 2025
Starting price
- Galaxy Watch 9 40mm
- —
- Xiaomi Watch S4 41mm
- —
Display size
- Galaxy Watch 9 40mm
- 1.3-inch
- Xiaomi Watch S4 41mm
- 1.3-inch
Dimensions
- Galaxy Watch 9 40mm
- 40.4 mm × 42.7 mm × 8.6 mm
- Xiaomi Watch S4 41mm
- 41.2 mm × 41.2 mm × 9.5 mm
Weight
- Galaxy Watch 9 40mm
- 32 g
- Xiaomi Watch S4 41mm
- 32 g
Front material
- Galaxy Watch 9 40mm
- Sapphire crystal
- Xiaomi Watch S4 41mm
- —
Back material
- Galaxy Watch 9 40mm
- —
- Xiaomi Watch S4 41mm
- —
Display
Display technology
- Galaxy Watch 9 40mm
- Super AMOLED
- Xiaomi Watch S4 41mm
- AMOLED
Resolution
- Galaxy Watch 9 40mm
- 438 × 438
- Xiaomi Watch S4 41mm
- 466 × 466
Peak brightness
- Galaxy Watch 9 40mm
- 3000 nits
- Xiaomi Watch S4 41mm
- —
Protection
- Galaxy Watch 9 40mm
- Sapphire crystal
- Xiaomi Watch S4 41mm
- —
Performance
Chipset
- Galaxy Watch 9 40mm
- Qualcomm Snapdragon Wear Elite (SDW6100)
- Xiaomi Watch S4 41mm
- —
RAM
- Galaxy Watch 9 40mm
- 2 GB
- Xiaomi Watch S4 41mm
- —
Storage
- Galaxy Watch 9 40mm
- 32 GB
- Xiaomi Watch S4 41mm
- —
Expandable storage
- Galaxy Watch 9 40mm
- No
- Xiaomi Watch S4 41mm
- No
Battery & charging
Battery capacity
- Galaxy Watch 9 40mm
- 390 mAh
- Xiaomi Watch S4 41mm
- —
Charging standard
- Galaxy Watch 9 40mm
- Wireless charging (WPC) with Fast Charging
- Xiaomi Watch S4 41mm
- Magnetic charging dock
Battery type
- Galaxy Watch 9 40mm
- Lithium-ion
- Xiaomi Watch S4 41mm
- Lithium-ion polymer
Connectivity
Cellular
- Galaxy Watch 9 40mm
- LTE (optional models), Dual-frequency GPS (L1+L5)
- Xiaomi Watch S4 41mm
- GPS / multi-GNSS
Wi‑Fi
- Galaxy Watch 9 40mm
- Wi‑Fi 6
- Xiaomi Watch S4 41mm
- —
Bluetooth
- Galaxy Watch 9 40mm
- Bluetooth 6.0
- Xiaomi Watch S4 41mm
- Bluetooth
NFC
- Galaxy Watch 9 40mm
- Yes
- Xiaomi Watch S4 41mm
- Yes
Build & durability
Frame
- Galaxy Watch 9 40mm
- Aluminum
- Xiaomi Watch S4 41mm
- —
Ingress protection
- Galaxy Watch 9 40mm
- 5ATM / IP68 / MIL-STD-810H
- Xiaomi Watch S4 41mm
- 5 ATM
Key differences
The most meaningful measured gaps in size and weight — not an overall winner.
Thickness
Galaxy Watch 9 40mm
0.9 mm thinner
Height
Galaxy Watch 9 40mm
1.5 mm taller · minor difference
Width
Xiaomi Watch S4 41mm
0.8 mm wider · minor difference
Weight
Very similar weight