Eh, that depends. It may make a difference, but the question is if it would be noticeable or not. A lot of the benchmarks you may see may show a difference, but those are with benchmarks and graphs, not just simply playing the game. I doubt it would be a night and day difference.
Personally, i'd go with whatever can save me the most money. Every system i've personally built has been AMD based and they've always ran everything without problem.