What is the difference between the Galaxy Watch 3 and the Galaxy Watch?

What is the difference between the Galaxy Watch3 and the Galaxy Watch?

Galaxy Watch3 is a next-generation companion for managing your routines, smashing your fitness goals, and taking ownership over your health. Built with premium materials and a slimmed-down version of the popular rotating bezel, Galaxy Watch3 features the craftsmanship of a luxury timepiece, while still being comfortable enough to wear all day and all night.

Compare the Galaxy Watch
 

Galaxy Watch 46/42mm

Galaxy Watch3 45/41mm

Galaxy Watch Active2 44/40mm

OS

Tizen Based Wearable OS 4.0

Tizen Based Wearable OS 5.5

Tizen Based Wearable OS 4.0

Display

1.3"(33mmm)/ 1.2"(30mm)

Super AMOLED, Corning Gorilla Glass DX+

1.4"(34mm) / 1.2"(30mm)

Super AMOLED, Corning Gorilla Glass DX

(2.5D Front + 3D Glass)

1.4"(34mm) / 1.2"(30mm)

Super AMOLED, Gorilla Glass DX+

(2.5D Front + 3D Back Glass)

Size / Weight

46.0 x 49.0 x 12.9 mm / 63g

41.9 x 45.7 x 12.7 mm / 49g

45.0 x 46.2 x 11.1 mm / 53.8g (Titan 43g)

41.0 x 42.5 x 11.3 mm / 48.2g

44 x 44 x 10.9T 42g [SUS] / 30g [AL]

40 x 40 x 10.9T 37g [SUS] / 26g [AL]

Memory

1.5GB + 4GB (LTE)

768MB + 4GB (BT)

1GB + 8GB

1.5 GB + 4 GB (LTE)

768 MB + 4 GB (BT)

Material

Stainless Steel 316L

Stainless Steel 316L / Titanium

Stainless Steel 316L / Aluminium Series 7000

Sensor

Photo Plethysmography (4PD)

Accelerometer (up to 16G)

Gyro, Barometer , Ambient Light

Photo Plethysmography (8PD)

Electrocardiogram (ECG)

Accelerometer (up to 32G)

Gyro, Barometer, Ambient Light

Photo Plethysmography (8PD)

Electrocardiogram (ECG)

Accelerometer (up to 32G)

Gyro, Barometer, Ambient Light

PUI

2 Button, Rotating Bezel

2 Button, Rotating Bezel

2 Button, Touch Bezel (No wheel)

Battery

470mAh (80hrs)

270mAh (45hrs)

340mAh (56hrs)

247mAh (43hrs) 

340mAh (60hrs)

247mAh (43hrs)

Durability

5ATM + IP68 / MIL-STD-810G

5ATM + IP68 / MIL-STD-810G

5ATM + IP68 / MIL-STD-810G

misc

Mic, Linear Motor, Speaker

Mic, Linear Motor, Speaker

Mic, Linear Motor, Speaker

Colour

Silver (46mm), Midnight Black, Rose Gold (42mm)

Mystic Black, Mystic Silver, Mystic Bronze

Cloud Silver, Ink Gold, Aqua Black (Aluminium), Silver, Black, Gold (Stainless steel)

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