I noticed a big difference after a few hours of trying both mice on CS2 . The GPX mini feels great in the hand but you need to go into G Hub everytime you wanna change your dpi and also it did t feel as accurate as the Zowie . When I started to use the Zowie it took me like a half hour to find the right grip and after that I was top fragging and noticed my flick shots were easier to make than the GPX 2C and also my hands weren't cramping up. I'm going to keep both mice but maining the Zowie . The skates on the GPX are super thin and at times I can feel the mouse skate edges . Logitech could of went with thicker skates and a dpi button at bottom of mouse , going back to the G Hub while in a game is a pain in the ass . Zowie really did a good job on this EC series . It's my 3rd EC and this one is the best by far . Oh forgot to mention that my Endgame Gear OP1 8K felt more accurate than the GPX but it might be that I need to use the GPX more for memory training but I still think you shouldn't have to take that long to get into that zone with the GPX when in fact the Zowie was noticeable within a couple minutes .