Samsung Galaxy Watch Ultra vs Samsung Galaxy Watch4

The two products' specifications row by row. Rows where they differ are marked; a missing value is unknown, never equal.

3 differences
SpecificationSamsung Galaxy Watch UltraSamsung Galaxy Watch4
Watch case materialDiffersTitanium grade4Aluminum
Display resolutionDiffers480 x 480 pixels450 x 450 pixels
Bluetooth versionDiffersBluetooth v5.35.0
Display typeSameSuper AMOLEDSuper AMOLED
Wi-FiSameYesYes
Water resistancenot knownnot known5ATM + IP68
Display diagonalnot knownnot known1.4"
Display technologynot knownnot knownSuper AMOLED
Near Field Communication (NFC)not knownnot knownYes
Battery capacitynot knownnot known361 mAh
Battery life (max)not knownnot known40 h
Heart rate monitornot knownnot knownYes
Wireless chargingnot knownnot knownWPC-based wireless charging
Operating system installednot knownnot knownWear OS Powered by Samsung
Weightnot knownnot known30.3 g
Dimensions (WxDxH)not knownnot known44.4 x 43.3 x 9.8 mm
Activity measurementsnot knownnot knownGPS/Glonass/Beidou/Galileo
Device memorynot knownnot known16 GB
Gorilla Glassnot knownnot knownYes
Heart-rate derived metricsnot knownnot knownblood oxygen
Interchangeable strapsnot knownnot knownYes
MIL-STD-810G compliantnot knownnot knownYes