I think this is one of those comparisons where there isn't going to be a clear cut winner. Depending on the game and resolution played at, I would expect them to trade blows. In many cases, the i5 and i3 put up identical numbers, but the i5 will have an advantage in more CPU intensive games. Either combination would work well for 1080p and I don't think that one is going to be significantly better than the other in any case.