Both run Wear OS and both have sapphire. The Xiaomi is big and long-lasting, the Samsung slim and light.
Short answer
Xiaomi Watch 5 - 930 mAh, up to 6 days, 1.54" 480×480. Galaxy Watch8 40 mm - 8.6 mm and 30 g, IP68 and MIL-STD-810H, cheaper.
Key differences
| Spec | Xiaomi Watch 5 | Samsung Galaxy Watch8 40mm Bluetooth |
|---|---|---|
| Display | 1.54", AMOLED, 480×480 | 1.34", Super AMOLED, 438×438 |
| Chip | Qualcomm Snapdragon W5 Gen 1 | Samsung Exynos W1000 |
| Memory | 2 GB / 32 GB | 2 GB RAM / 32 GB |
| Battery life | up to 6 days | — |
| Battery | 930 mAh | 325 mAh |
| Connectivity | Bluetooth, Wi-Fi | Bluetooth, Wi-Fi |
| Navigation | GPS, GLONASS, Galileo, BeiDou, QZSS (L1 + L5) | GPS, GLONASS, Galileo, BeiDou (L1 + L5) |
| NFC | yes | yes |
| Sensors | heart rate, SpO2, barometer, compass, gyroscope | heart rate, SpO2, barometer, compass, gyroscope, temperature |
| Protection | 5 ATM | 5 ATM / IP68 / MIL-STD-810H |
| OS | Wear OS | Wear OS 6 |
| Compatibility | Android 8.0+ (GMS) | Android 12+, Google Mobile Services |
| Dimensions, weight | 47×47×12.3 mm, 56 g | 42.7×40.4×8.6 mm, 30 g |
| Price | current prices | current prices |
Specs come from the device pages on Smartphone.ua.
Battery
930 vs 325 mAh - almost three times as much.
Case
47×47×12.3 mm and 56 g vs 42.7×40.4×8.6 mm and 30 g.
Protection
5 ATM vs 5 ATM, IP68 and MIL-STD-810H.
Verdict: who should buy which
- Battery life and a big screen - Xiaomi Watch 5.
- Compactness and price - Galaxy Watch8 40 mm.
FAQ
Do they work with an iPhone?
No, both are Android only.
How much storage?
2/32 GB on both.
Which is cheaper?
The Galaxy Watch8.