I own a XBOX, but that's mainly because my friends own one, so I can play with them. I think that's the biggest motivator for either platform. I'm pretty sure a whole bunch of elitists will follow with flaming each other, but they're not that different anymore. PS4 has more and better exclusive titles, XBOX has play anywhere for some games (so you can play them on PC too) and gamepass which gives you access to a whole bunch of games for a montly fee.
So it's more whether you'd like to play either of the exclusive games really bad, and what your friends have.