Apple Watch 40mm Series 4 vs Apple Watch Series 3 Aluminum

Apple Watch 40mm Series 4

Apple Watch Series 3 Aluminum

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA

HSDPA 850, 900, 2100, 800 - Europe, Australia; HSDPA 850, 1700(AWS), 1900, 800 - USA, LATAM, Canada; HSDPA 2100 - China
4G network

LTE

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 18(800), 19(800), 20(800), 26(850) - Europe, Australia; LTE frequency band 2(1900), 4(1700/2100), 5(850), 12(700), 13(700), 17(700), 18(800), 19(800), 25(1900), 26(850), 41(2500) - USA, LATAM, Canada; LTE frequency band 1(2100), 3(1800), 39(1900), 40(2300), 41(2500) - China
HSPA speed

-

HSPA
LTE speed

-

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Stainless Steel frame; all-ceramic/sapphire crystal back

Aluminum/Ceramic back
SIM

Electronic SIM card (Apple e-SIM)

Electronic SIM card (Apple e-SIM)
Height

40 mm

42.5 mm
Width

34 mm

36.4 mm
Thickness

10.7 mm

11.4 mm
Weight

40 g

34.9 g
Waterproof

50m

50m
Colors

Black, Gold, Silver

Gold, Silver, Space Gray

Features
Messaging SMS

-

SMS(threaded view)
Messaging Email

-

Email
Messaging IM

-

IM
Messaging Push Mail

-

Push Mail
Java

-

No
Sensors

Accelerometer, barometer, gyro (second gen), heart rate

Accelerometer, barometer, gyro, heart rate