Casio GBA-400vsCasio GD-100

Owners report the Casio GBA-400 is a rugged, 200m water-resistant Bluetooth watch that allows remote music control from a smartphone. The watch has demonstrated remarkable durability, with one owner noting it looked brand new after five years of use and various tortures. However, connectivity issues are noted, with one owner unable to connect to an iPhone and another reporting the app does not work with Android 12, while Bluetooth connectivity can be inconsistent and music controls may not work with all phones. Some owners also flag the crown as fragile, with one reporting it broke and required repair. Overall, owners rate the Casio GBA-400 highly for its durability and ruggedness, despite noted Bluetooth connectivity and crown fragility concerns.

Owners widely praise the Casio GD-100 for its stealthy, manly aesthetic, excellent negative display, and amazing backlight, with some noting its appearance in Jurassic World and a 7-year battery life. Reviewers and owners value its large LCD, legible display, and the overall toughness associated with the G-Shock line, with some finding it a great daily driver. The Casio GD-100 is considered a large watch, measuring 51.2mm, and some owners find the negative display difficult to read in low light, though others state the illuminator backlight easily overcomes this. On balance, owners rate the Casio GD-100 highly for its attractive appearance and robust functionality at an accessible price point.