Nvidia and AMD(ati) Why a different color?

[xamelioner]

I tested three video cards
1 ATI 7950
2 Nvidia GTX 550
3 Nvidia GTX 980
And surprised.
colors: http://clip2net.com/s/3j6HzyL
I can imagine that developers use Nvidia card?


brightness: http://clip2net.com/s/3j6HXKs
http://clip2net.com/s/3j6Iuaa FPS (frapsBM_no_video_capture)
http://clip2net.com/s/3j6IZga responses (frapsBM_no_video_capture)
https://youtu.be/VjjmjzLVxs0 this video