When I say smaller, I'm referring to the width of the controller. The DS4 is longer horizontally, at least it feels and looks that way to me. The only type of games that I need a specific controller for are fighting games and that's because I use the d-pad. Xbox d-pads are trash. I'm not sure how a controller makes a difference in FPS games but hey to each is own I guess
DS4 battery life sucks, you can get about 4 hours of usage before you have to charge it again. X1 controller still uses batteries in 2014, I'm not about that rechargeable battery life so I don't see the upside as far as the battery life is concerned.