Look at the next gen facts before buying a console, and please note I actually love the Xbox.....
PS4 costs $100 less than the xbox one , having said that the Xbox one comes with the Kinect and if you were to buy the PS4 camera it would cost you almost $90!
PS4 has 407 GB space on the HDD Xbox One has 362GB space.
You can expand the PS4 storage without voiding the warranty , the Xbox One HDD is internal, it can be expanded but will void the warranty, although MS do say that USB support will be coming later in the year!
The PS4 currently has 27 games to date, and the Xbox One has 9.
I have both consoles and right now there isn't a lot of difference in them. We wont start to see what these machines can do for at least the next 12 months. Personally I still prefer the Xbox One...