XBL.
I dont understand (and probably never will) why a premium has to be paid to limit the internet access on your xbox.
in terms of servers, MAG and resistance prove PSN is better at that and trophies > achievements. also XBL doesnt save you as much money as PSN plus.
only decent advantage it has is crossgame chat but who uses that anyway?
second is kinect, i really didnt expect so many people to buy all the shovelware they did. that will unfortunatly go down as an epic fail in consumer history.