Windows is closed source so it has to do extra stuff to hide it’s internal behavior. Linux isn’t. This allows better drivers in Linux. This means in some cases emulating windows games on Linux is literally faster. You don’t have to emulate the entire system, only the parts you need to run the game on your computer.
http://emulation.gametechwiki.com/index.php/Input_lag#GPU_driver_latency
Windows is closed source so it has to do extra stuff to hide it’s internal behavior. Linux isn’t. This allows better drivers in Linux. This means in some cases emulating windows games on Linux is literally faster. You don’t have to emulate the entire system, only the parts you need to run the game on your computer.