| Display | Always-On Retina LTPO OLED, up to 2000 nits maximum, 1 nit minimum, 326 ppi; Ion-X glass (aluminum) or sapphire (stainless steel) | OLED Retina, up to 30% more screen area than Series 9 |
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| Chipset | S9 SiP (64-bit dual-core, 4-core Neural Engine), second-generation Ultra Wideband | Apple S10 (Sawtooth cores from A16 Bionic) |
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| Storage | 64GB | — |
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| Sizes | 41mm (31.9 g aluminum GPS) and 45mm (38.7 g aluminum GPS); 10.7 mm deep | — |
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| Battery | Up to 18 hours of normal use; up to 36 hours in Low Power Mode; fast charging to 80% in about 45 minutes | — |
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| Sensors | Third-generation optical heart sensor, electrical heart sensor (ECG app), temperature sensing, compass, always-on altimeter, high-g accelerometer, gyroscope, ambient light sensor | — |
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| Connectivity | Wi-Fi 4, Bluetooth 5.3, GPS/GNSS (L1), optional LTE and UMTS | — |
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| Durability | Water resistance 50 m (ISO 22810:2010), IP6X dust resistance | — |
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| Controls | Digital Crown, side button, new double tap gesture, on-device Siri | — |
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| OS | watchOS 10 | watchOS 10 |
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| Case Sizes | — | 42mm / 46mm |
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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 |
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