Xiaomi Watch S3 vs Samsung Galaxy Watch Ultra

Xiaomi Watch S3

Xiaomi Watch S3

vsSamsung Galaxy Watch Ultra

Samsung Galaxy Watch Ultra

Xiaomi Watch S3Samsung Galaxy Watch Ultra
Display1.43" AMOLED, 466 x 466 pixels, 326 ppi, 60Hz, 600 nits1.5-inch (37.3 mm) 480 x 480 Super AMOLED, always on, up to 3,000 nits
ChipBES 2700BP—
Memory32MB RAM + 4GB ROM—
CaseAluminum alloy frame, stainless steel bezel, Corning glass; interchangeable bezel (extra bezels sold separately)47 mm, Titanium Grade 4, 47.1 x 47.4 x 12.1 mm, 60.5 g
Size47 x 47 x 12 mm, 44 g without strap—
StrapFluororubber, 140-210 mm adjustable—
BatteryUp to 15 days typical use (Android), up to 14.5 days (iOS), up to 5 days with always-on display; 486 mAh, 2-pin magnetic charging dock—
Water Resistance5 ATM—
PositioningDual-band L1+L5 GNSS: GPS, BeiDou, GLONASS, Galileo, QZSS—
ConnectivityBluetooth 5.2, Bluetooth calling, NFC (Mastercard terminals, varies by region)LTE, Bluetooth 5.3, Wi-Fi 2.4 + 5 GHz, NFC, dual-frequency GPS
SensorsHeart rate with blood oxygen, accelerometer, gyroscope, compass, barometer, ambient light, hall sensorSamsung BioActive Sensor (optical, electrical heart signal, bioelectrical impedance), temperature, barometer, gyro, geomagnetic, light
Sports Modes150+ sports modes—
CompatibilityAndroid 8.0 or later, iOS 12.0 or later—
ColorsBlack, SilverTitanium Grey, Titanium White, Titanium Silver (Titanium Blue added in 2025)
Processor—Exynos W1000 (5-core, 3 nm)
Durability—10ATM, IP68, MIL-STD-810H; operates from 100 m below to 9,000 m above sea level
OS—Wear OS 5 (launch)
Price—599 pounds in the UK at launch