| Case Sizes | 42mm / 46mm | — |
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| Display | OLED Retina, up to 30% more screen area than Series 9 | Flat crystal, up to 3000 nits |
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| Chipset | Apple S10 (Sawtooth cores from A16 Bionic) | Apple S9 SiP, 2nd-gen Ultra Wideband |
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| Battery Life | 18 hours | — |
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| Health Sensors | HR, SpO2, ECG, FDA-approved sleep apnea detection, water depth/temperature | Heart rate, water temperature, sleep apnea detection, blood oxygen (calculated on paired iPhone) |
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| OS | watchOS 10 | watchOS 10 (at launch) |
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| Case Size | — | 49mm titanium |
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| Battery | — | Up to 36 hours; up to about 60 hours in low-power mode |
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| Water Resistance | — | WR100 / EN13319, recreational dives to 40 m |
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| Connectivity | — | Cellular, dual-frequency GPS (L1 + L5) |
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