The gap is small, and the 44 mm gives you both a bigger screen and a bigger battery.
Short answer
Galaxy Watch9 44 mm - 1.47" 480×480 and 445 mAh. Galaxy Watch9 40 mm - compact and lighter (31.5 vs 34 g).
Key differences
| Spec | Samsung Galaxy Watch9 40mm Bluetooth | Samsung Galaxy Watch9 44mm Bluetooth |
|---|---|---|
| Display | 1.34", Super AMOLED, 438×438 | 1.47", Super AMOLED, 480×480 |
| Chip | Qualcomm Snapdragon Wear Elite | Qualcomm Snapdragon Wear Elite |
| Memory | 2 GB RAM / 32 GB | 2 GB RAM / 32 GB |
| Battery | 390 mAh | 445 mAh |
| Connectivity | Bluetooth, Wi-Fi | Bluetooth, Wi-Fi |
| Navigation | GPS, GLONASS, Galileo, BeiDou (L1 + L5) | GPS, GLONASS, Galileo, BeiDou (L1 + L5) |
| NFC | yes | yes |
| Sensors | heart rate, SpO2, barometer, compass, gyroscope, temperature | heart rate, SpO2, barometer, compass, gyroscope, temperature |
| Protection | 5 ATM / IP68 / MIL-STD-810H | 5 ATM / IP68 / MIL-STD-810H |
| OS | Wear OS 7 | Wear OS 7 |
| Compatibility | Android 13+, Google Mobile Services | Android 13+, Google Mobile Services |
| Dimensions, weight | 42.7×40.4×8.6 mm, 31.5 g | 46.0×43.7×8.6 mm, 34 g |
| Price | current prices | current prices |
Specs come from the device pages on Smartphone.ua.
What's the same
Snapdragon Wear Elite, 2/32 GB, Wear OS 7, sapphire, 5 ATM and IP68, 8.6 mm, L1 + L5.
Display
1.34" 438×438 vs 1.47" 480×480.
Battery
390 vs 445 mAh.
Verdict: who should buy which
- Screen and battery life - Galaxy Watch9 44 mm.
- Slim wrist - Galaxy Watch9 40 mm.
FAQ
How thick are they?
8.6 mm each.
Is there LTE?
These versions are Bluetooth and Wi-Fi only.
Which is cheaper?
The 40 mm.