Display, case and connectivity are the same. The extra is for a new chip and eight more hours.
Short answer
Ultra 4 - Apple S11, up to 50 h and watchOS 27. Ultra 3 - almost the same for less.
Key differences
| Spec | Apple Watch Ultra 3 49mm GPS + Cellular | Apple Watch Ultra 4 49mm GPS + Cellular |
|---|---|---|
| Display | OLED, 422×514 | OLED, 422×514 |
| Chip | Apple S10 | Apple S11 |
| Memory | 64 GB | 64 GB |
| Battery life | up to 42 h | up to 50 h |
| Connectivity | 5G RedCap, LTE, eSIM | 5G RedCap, LTE, eSIM |
| Navigation | GPS, GLONASS, Galileo, QZSS, BeiDou (L1 + L5) | GPS, GLONASS, Galileo, QZSS, BeiDou (L1 + L5) |
| NFC | yes | yes |
| Sensors | heart rate, SpO2, barometer, compass, gyroscope, temperature | heart rate, SpO2, barometer, compass, gyroscope, temperature |
| Protection | 100 m / IP6X / EN13319 | 100 m / IP6X / EN13319 |
| OS | watchOS 26 | watchOS 27 |
| Compatibility | iPhone 11 / iPhone SE 2 / iOS 26 | iPhone 11 / iPhone SE 2 / iOS 27 |
| Dimensions, weight | 49×44×12 mm, 61.6 g | 49×44×12 mm, 63 g |
| Price | current prices | current prices |
Specs come from the device pages on Smartphone.ua.
Chips
Apple S10 vs S11.
Battery life
Up to 42 vs up to 50 h - noticeable on hikes.
What's the same
422×514 display, titanium, sapphire, 100 m, EN13319, 5G RedCap, LTE, eSIM, L1 + L5.
Verdict: who should buy which
- Longest battery life - Ultra 4.
- Saving money - Ultra 3.
FAQ
Is the case the same?
Yes, 49×44×12 mm; 61.6 and 63 g.
Is there 5G?
Yes, 5G RedCap on both.
Which is cheaper?
The Ultra 3.