Apple Watch SE vs Apple Watch Series 7 Aluminum

A2353, A2354, A2355, A2356, A2351, A2352

Apple Watch Series 7 Aluminum

2020, October

2021, October

2020, October

2021, October

Square

Bar

44 x 38 x 10.4 mm (1.73 x 1.50 x 0.41 in)

45 x 38 x 10.7 mm (1.77 x 1.50 x 0.42 in)

36.4 g (1.27 oz)

32 g (41mm), 38.8 g (45mm) (1.13 oz)

Glass front, ceramic/sapphire crystal back, aluminum frame

Glass front, ceramic/sapphire crystal back, aluminum frame 50m water resistant IP6X certified

Silver, Gold, Space Gray

Starlight, Midnight, Blue, Green, Red

448 x 368 pixels

484 x 396 pixels

326 ppi density

-

Yes, 3D Touch display

Yes

-

Always-on display

watchOS 7.0

WatchOS 8.0

Apple S5

Apple S7

1 GB

Unspecified

Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass

Accelerometer, gyro, heart rate (3rd gen), barometer, always-on altimeter, compass, SpO2, VO2max Natural language commands and dictation (talking mode) Ultra Wideband (UWB) support ECG certified (region dependent SW application; HW available on all models)

Wi-Fi 802.11 b/g/n

Wi-Fi 802.11 b/g/n, dual-band

Yes, with A-GPS, GLONASS

Yes, with A-GPS, GLONASS, GALILEO, QZSS, BDS