Have a $100 Gamestop gift card, thinking about either an Xbox One or PS4 Pro. Thoughts?

I was given a gift card for Valentine's Day and I was thinking of putting it toward either an Xbox One or PS4 Pro. I already have a regular, old-school PS4 but it's always running out of space and I recently bought a 4K TV. I used to own an Xbox One (very briefly, less than a week back in early 2014) and didn't like the UI experience much and couldn't find any games that were either exclusives or that I didn't already own on the PS4 (aside from Halo, which has also just gotten weird as a series)

What would you all recommend? I'm also considering using it to get a $100 Steam wallet gift card. Are there any upcoming or existing Xbox One games that make it worth the purchase?