I agree with Bill as to a personal preference. The fact that it is strictly a home instrument,IMHO, levels the playing field. They both are great keyboards, and I considered both, but performance navigation, ease of transport, better sounding bass and accompaniment(for gigs) led me to the Pa4X. It is very intuitive, and had no problem learning it(as far as I have gotten). The fact that it can play CDG files and easily make styles from midi, was another reason. Lastly, an old country boy from Louisiana tilted the scale.

OOH the T5 was close in the race for a lot of reasons, like, all the styles you would ever want being easily available for free, Organ World, ensemble, great sounding lead instruments(although Pa4X does too), and features the T5 people could mention.

Since some of my reasons are now moot for you, it is a toss up except for a grand difference in price.