Can’t choose between G-Shock GM-2100 and GA-2100? Enjoy our comparison table and the best features unique list of each series.
GM-2100N-2A 
GA-2100-1A
Price (Amazon) | ||
Year of first Release | 2021 | 2019 |
Accuracy | ±15 seconds per month | ±15 seconds per month |
SmartWatch Features | No | No |
Light | Double LED light | Neobrite (hands and hour markers) Double LED light |
Alarm | 5 daily alarms | 5 daily alarms |
Timer | Measuring unit: 1 second | Measuring unit: 1 second |
Stopwatch | 1/100-second stopwatch | 1/100-second stopwatch |
Hourly Time Signal | Yes | Yes |
World Time | 31 time zones (48 cities + coordinated universal time), daylight saving on/off | 31 time zones (48 cities + coordinated universal time), daylight saving on/off |
Case / bezel material | Resin / Stainless steel | Carbon (Carbon Core Guard) / Resin |
Glass | Mineral Glass | Mineral Glass |
Battery | 3 years on SR726W × 2 | 3 years on SR726W |
Size (mm) *we consider 48.9×42.8×13.4 to be a traditional watch size (as in DW-5600). So you are to compare how far or close the watch is to this size | 48.5 x 45.4 x 11.8 | 48.5×45.4×11.8 |
Full features (if you want to know more) |
*Want to compare some other features? Please, comment and we will improve our table.
GM-2100 Profile
Average Amazon Price: $250 (yes, we may earn a commission on qualifying purchases from our links to Amazon). Check the Price on Amazon →
Year of first release: 2021
Lineup: STANDART ANA-DIGI (This Line includes Digital and Analog displays on G-Shocks that are the best in “price/quality” category. Usually have traditional digital functions, but with beautiful hands. Don’t worry, the hands won’t prevent you from seeing digits, since there is a special Hand Shift technology that moves them to the neutral position) All G-Shock Standart Ana-Digi Watches →
Best for: Teenagers, Office and Formal Wear, Artists, Singers, Dancers…
The most distinctive specs:
— Steel Casio Oak (popular octagonal bezel. Casio simply replaced the watch with a stainless steel bezel and case, making the watch more stylish and more weighty)
— Carbon Core Guard Structure (protects the module with a carbon case. Highly durable carbon fiber-reinforced resin is added not only to the center case, but also to the front and side button guards, providing even stronger resistance to shocks from above or below, or from any side)
— Stylish Look (for everyone for any style)
— 200-meter water resistance (good for swimming but not for deep diving)
Other colors and full specs: GM-2100 Wiki Page
Only Limited Editions: GM-2100 Limited Editions
G-Shock GM-2100 Rating System
| Size | ★★★★★ |
| Weight | ★★ |
| Functions | ★★★ |
| Materials | ★★★★★ |
| Battery Years | ★★★ |
| Price | ★★★ |
GA-2100 Profile / Casio G-Shock
Average Amazon Price: $100 (yes, we may earn a commission on qualifying purchases from our links to Amazon). Check the Price on Amazon →
Year of first release: 2019
Lineup: STANDART ANA-DIGI (This Line includes Digital and Analog displays on G-Shocks that are the best in “price/quality” category. Usually have traditional digital functions, but with beautiful hands. Don’t worry, the hands won’t prevent you from seeing digits, since there is a special Hand Shift technology that moves them to the neutral position) All G-Shock Standart Ana-digi Watches →
Best for: Small Wrists, Teenagers, Office and Formal Wear, Top in G-Shock Lookbooks
The most distinctive specs:
– 200-meter water resistance (good for swimming but not for deep diving)
– Carbon Core Guard structure (protects the module by enclosing it in a carbon case. The case is made of fine resin embedded with carbon fibers for outstanding strength and crack resistance)
Other colors and full specs: GA-2100 Wiki Page
Only Limited Editions: GA-2100 Limited Editions
G-Shock GA-2100 Rating System
| Size | ★★★★★ |
| Weight | ★★★★★ |
| Functions | ★★★ |
| Materials | ★★★★★ |
| Battery Years | ★★★ |
| Price | ★★★★★ |