The Endgame Gear XM1 and the Glorious Model O are two great ultralight gaming mice. The XM1 is ever-so-slightly heavier, but it feels better-made thanks to its solid shell body. It’s cable also feels a bit better than the Model O’s. Its CPI range is also wider and can be customized more precisely. On the other hand, the Model O’s lift-off distance is shorter, and thanks to its software, you can reprogram all six buttons, which you can’t do on the XM1. The Glorious also has RGB lighting, while the XM1 has a more sleek and plain design.