while regular optical mice work fine when playing games certain genres e.g (FPS and ,MOBA) First Person Shooter Multiplayer Online Battle Arena.
Sensitivity is improved when using a gaming mouse. There mice include programmable buttons which can be assigned to different functions. They are more sensitive, sensitivity is measured in Dots per inch or DPI. This represents how many pixels the mouse’s pointer will move when you move your mouse across a surface. When using HD monitors 1920 x 1080 800 to 1600 dpi will do just fine.