Apple Watch Series 6 Aluminum vs Apple Watch Series 7

A2293, A2294, A2375, A2376, A2291, A2292

A2475, A2476, A2477, A2478, watch6,8, watch6,9

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)

47.1 g (1.66 oz)

42.3 g (41mm), 51.5 g (45mm) (1.48 oz)

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

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

Silver, Gold, Space Gray, Blue, Red

Graphite, Gold, Silver

1.78 inches, 10.0 cm2 (~60.0% screen-to-body ratio)

1.9 inches

448 x 368 pixels

484 x 396 pixels

Yes, 3D Touch display

Yes

Ion-X strengthened glass

Sapphire crystal glass

Always-on display

1000 nits (peak) Always-on display

-

16M colors or more

watchOS 7.0

WatchOS 8.0, upgradable to 8.1

-

Apple WatchOS

Apple S6

Apple S7

1 GB

Unspecified

Accelerometer, gyro, heart rate (2nd gen), barometer, always-on altimeter, compass, SpO2, VO2max

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)

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

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

303.8 mAh

309 mAh (1.19 Wh), Battery