Apple Watch Series 9 45mm vs Apple Watch Ultra 2

Apple Watch Series 9 45mm

Apple Watch Ultra 2

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 900, 1700(AWS), 1900, 2100 - global version, China, Hong Kong; 850, 1700(AWS), 1900, 2100 - USA, LATAM, Canada
4G network

LTE frequency band 1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66

LTE frequency band 1, 2, 3, 4, 5, 6, 7, 8, 18, 19, 20, 25, 26, 28, 39, 40, 41, 66 - International, China, Hong Kong; 1, 2, 3, 4, 5, 6, 7, 12, 13, 14, 17, 18, 19, 25, 26, 39, 40, 41, 66 - USA, LATAM, Canada

Design
Build

Glass front, ceramic/sapphire crystal back, stainless steel frame

Sapphire crystal front, ceramic/sapphire crystal back, titanium frame
SIM

eSIM

eSIM
Height

45 mm

49 mm
Width

38 mm

44 mm
Thickness

10.7 mm

14.4 mm
Weight

51.5 g

61.4 g
Waterproof

IP6X (50m)

IP6X (40m)
Dust proof

IP6X

IP6X
MIL-STD-810H

-

Yes
Colors

Graphite, Gold, Silver

Titanium

Display
Display type

Retina LTPO OLED

Retina LTPO OLED
Physical size

1.9 inches

1.92 inches
Resolution

484 x 396 pixels

502 x 410 pixels
Pixel density

326 ppi

338 ppi
Display colors

16777216

-
Protection

Sapphire crystal glass

Sapphire crystal glass
Display features

Always-on display, 2000 nits (peak)

Always-on display, 3000 nits (peak)

Features
Sensors

Accelerometer, always-on altimeter, barometer, compass, gyroscope, heart rate, SpO2, temperature (body), VO2max

Accelerometer, always-on altimeter, barometer, compass, gyro, heart rate, SpO2, temperature (body), temperature(water), VO2max