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Casio G-Shock GA-2100-1AER vs. Casio G-Shock G-9300RD-4 + 2

Clock face
Black
Black
Blue
Colour of bracelet
Black
Black, Grey, Green
Type of hands
Analogue (clockwork), Digital
Analogue (clockwork), Digital
Analogue (clockwork)
Thickness
12 mm
19 mm
11.8 mm
Width
45 mm
53 mm
41 mm
Features
Date display, Chronograph, Lighting, Timer, World time, Shock resistant, Stopwatch, Alarm, Luminescent
Shock resistant
Date display, Chronograph, Timer, World time, Shock resistant, Barometer, Bluetooth, Stopwatch, Alarm, Luminescent, Compass
Date display, Luminescent, Chronometer (COSC)
Water resistance (max depth)
200 m
200 m
300 m
Water resistance (max pressure)
20 ATM
20 ATM
30 ATM
Bracelet (material)
Resin Band, Rubber, Gold, Silicone
Resin Band
Resin Band, Rubber, Gold, Silicone
Steel
Case
Plastic / Synthetic
Plastic / Synthetic
Stainless steel
Type of glass
Mineral glass
Mineral glass
Sapphire glass
Primary power source
Battery
Battery
Battery
Automatic