Looks like they've made some quite major changes to the planned Xbox One: http://www.bbc.co.uk/news/technology-22980973
Xbox and EA sports have an agreement for certain features on games. It mainly affects American sports type games such as Ice Hockey, American Football, Basketball, etc but it also means that Ultimate Team on Fifa 14 can only be played via the Xbox. (I wanted to go back to Playstation this time)
I thought they were going to be available on both, but Xbox will have "exclusive content". Unless they've change their mind since this (23/5/13): FIFA 14 Ultimate Team confirmed for PS4
That is what they said but they also said UT on Fifa 14 would be exclusively for Xbox users. Hope that link you provided is right as I'm still going back to PS