The two versions of the Keychron M3 wireless gaming mouse, the M3-A1 and the M3-A4, differ mainly in the polling rate. M3-A1 (standard version): This version supports a polling rate of 1000 Hz, which is sufficient for most gaming scenarios and enables smooth and responsive input. M3-A4 (4K version): This version goes one step further and offers a polling rate of 4000 Hz in wireless 2.4 GHz mode. This means that it communicates with the computer much more frequently, which theoretically leads to an even faster response time. This is particularly interesting for professional gamers or for scenarios where maximum precision and speed are required. The choice between the two models therefore mainly depends on whether you need the extremely high sampling rate of the 4K version.