Samsung Galaxy Watch4 40mm vs Apple Watch SE 3 44mm

Exynos W920

S10 chip with 64-bit dual core processor

Dual-core, 2 at 1.18GHz

S10 chip with 64-bit dual core processor

4-core Neural Engine

16GB

64GB

1.5

Wear OS Powered by Samsung

26

Subject to change based on future operating system updates

Yes

Ask Siri to set a reminder, send an invitation, or give you directions, all without your phone.

Bands 2, 4, 5, and 12

Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 26, 28, 38, 39, 40, 41, 66, 71

HSPA+ with enhanced backhaul

850/1900MHz

850, 1700/2100, 1900, 2100MHz

Yes

Yes

Required to use smartwatch over cellular; rate plan required

802.11a/b/g/n

Wi-Fi 4 (802.11n)

2.4GHz & 5.0GHz

Open, Secure

v5.0 + EDR, A2DP, HS, LE

v5.3

Yes

eSim

Electronic SIM

Bands n1, n2, n3, n5, n7, n8, n12, n14, n20, n25, n26, n28, n38, n40, n41, n66, n71

Accelerometer, Ambient Light, Barometer, Gyroscope, Heart Rate, E-Compass, Magnetometer, ECG

Second-generation optical heart sensor

Temperature sensor

Compass

Always-on altimeter

High-g accelerometer

High dynamic range gyroscope

Ambient light sensor

Yes

Send and receive text messages from your wrist (messaging charges apply).

Yes

Outlook

Yes

Music

Apple Music®

MP3, M4A, 3GA, AAC, OGG, OGA, WAV, AMR, AWB

Yes

The AT&T Eco-Rating 2.0 system gives you environmental and social details about this device. The system uses a total of 20 performance criteria across 5 different attributes, for a total rating of 1 to 5 stars: 19-20 (5-star), 16-18 (4-star), 13-15 (3-star), 10-12 (2-star), 8-9 (1-star)

4/4

2/3

1/1

2/2

10/10

19/20 (5-star) Please visit www.att.com/ecospace for additional information

Track a casual walk, an intense ride, and everything in between.

Set workout-specific goals, see full summaries when you're done, and track how you're trending over time.

Keep tabs on your resting, walking, and workout recovery heart rate.