PS4 or Xbox One?

Looking to get one of the new systems by end of this year. In time for the release of Transformers Devastation.

Give your pros and cons of each system.

I don't have either one but I've read people talking about them. They are pretty evenly matched but it seems that difference comes from the exclusive titles for each one.

Haven't decided if I'll get either one as my older consoles keep me busy enough for my little free time.
Then again, perhaps it would make nice change if I'd get the Xbox One as haven't had a Microsoft Xbox console before. Forza driving games look just as good as Gran Turismos on Playstation and Forza even has some interesting cars there which GT series doesn't have, for example the 80's Pontiac Trans-Am GTA.