Difference bewteen Nvidia and ATI GPU

709zzy

Honorable
Jul 13, 2013
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10,690
Obviously, the different cards have different performance and stuff.
But I was wondering, is there a fundamental difference between the images that they produce?
So using the same computer, the same monitor, the same operation system, and the same in game settings, I noticed the graphics shown on my screen of specific games do look a little off after I switched my graphic card from ATI to Nvidia. There seems to be some small details that looked different even though the resolution is the same. Is that just my imagination? Theoretically, would the two images produced by the two different brand of graphic card look absolutely the same with nothing else changed including settings and such?
 

709zzy

Honorable
Jul 13, 2013
171
0
10,690
An example is Crysis 1. Using the same in game setting, the depth of field effect shown using my 7750 looked quite different from the depth of field effect from my gtx 760. The finer detail of the blur and the range of blur on the screen are definitely different. Is that due to the difference between the two cards in how they render such an effect?