Apple Watch Series 3 Aluminum vs Apple Watch Sport 38mm (1st gen)

Apple Watch Series 3 Aluminum

Apple Watch Sport 38mm (1st gen)

Network
2G network

GSM 850, 900, 1800, 1900

N/A
3G network

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

-
4G network

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

No
EDGE

Yes

No

Design
Build

Aluminum/Ceramic back

Aluminum/Composite back
SIM

Electronic SIM card (Apple e-SIM)

No
Height

42.5 mm

38.6 mm
Width

36.4 mm

33.3 mm
Thickness

11.4 mm

10.5 mm
Weight

34.9 g

25 g
Waterproof

50m

IPX7 certified, 1 m and 30 minutes
Colors

Gold, Silver, Space Gray

Apricot, Blue, Blue; Gray/Black; Rose Gold/Lavender, Orange, Pink/Royal Blue/Gold&Red/Black Woven Nylon, Royal Blue, Silver/White, Stone; Gold/White, Yellow

Features
Messaging SMS

SMS(threaded view)

SMS(threaded view)
Messaging Email

Email

Email
Messaging IM

IM

IM
Messaging Push Mail

Push Mail

Push Mail
Java

No

No
Sensors

Accelerometer, barometer, gyro, heart rate

Accelerometer, gyro, heart rate