I play with a controller and keyboard on PS3 and intend to continue that approach on PS4.

The interface is certainly different between the two versions (I have both, prefer PS3) - so there will be a learning curve where you will be below your regular skill level for a week or 2 if you switch. I really prefer the controller as I feel like I can move more responsively and I feel like I'm actually playing the game instead of simulating an experience via keyboard/mouse. That is very subjective though, I would expect, lol.