I have no idea on what it is, it might be the mouse (the right button worked normally though

(ie: play better) because of neat switches and buttons a normal mouse wouldn't have

The thumb rests on the sides are very comfortable and the buttons don't make that much noise.

The buttons and scroll wheel work pretty soft and they feel like good quality

The buttons and scroll wheel work pretty soft and they feel like good quality

You'll notice the left spot is almost completely barren of any copper coloring due to it rubbing off on my thumb, and the copper on the right side underneath the right-click button is fading onto my ring finger and a bit of my pinky

The DPI button is easy to use, but doesn't get bumped or accidentally pressed