In my experience Windows tends to have better performance consistency. On Linux I'll be getting 170fps one day and the next day I come back and I can barely hold 40fps. It's like, "What just happened here? Did a setting get flipped somewhere?"
In the end, the best driver for video games are the binary of nVidia?
Would you recommend buying a GeForce 770 then?
AMD binaries seems not optimized for GNU/Linux...