| Sizes | Watch8 in 40 mm and 44 mm (Graphite, Silver); Watch8 Classic in 46 mm (Black, White) | — |
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| Display | Super AMOLED with full-colour always-on display; 1.47-inch (44 mm) or 1.34-inch (40 mm, 46 mm Classic); sapphire crystal; up to 3,000 nits (Samsung claim) | Flat crystal, up to 3000 nits |
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| Chipset | Exynos W1000 (5-core, 3 nm) | Apple S9 SiP, 2nd-gen Ultra Wideband |
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| Memory / Storage | 2 GB memory, 32 GB or 64 GB storage depending on model | — |
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| Battery | 435 mAh (44 mm), 325 mAh (40 mm), 445 mAh (Classic 46 mm) | Up to 36 hours; up to about 60 hours in low-power mode |
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| Body | 8.6 mm thick and 30-34 g (Watch8); 10.6 mm and 63.5 g (Classic); 5ATM + IP68 / MIL-STD-810H | — |
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| OS | Wear OS 6 with One UI 8 Watch; Gemini out of the box | watchOS 10 (at launch) |
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| Health | Samsung BioActive Sensor, temperature sensor, Antioxidant Index, Bedtime Guidance, Vascular Load, Running Coach | — |
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| Connectivity | LTE models, Bluetooth 5.3, Wi-Fi, NFC, L1+L5 dual-frequency GPS | Cellular, dual-frequency GPS (L1 + L5) |
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| Case Size | — | 49mm titanium |
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| Health Sensors | — | Heart rate, water temperature, sleep apnea detection, blood oxygen (calculated on paired iPhone) |
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| Water Resistance | — | WR100 / EN13319, recreational dives to 40 m |
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