What type of games interest you? That may help in your decision. Many are supported on multiple platforms but some...very good ones are only on one or the other.
I own both the xbox1x and PS4pro. I end up playing with them both about the same amount of time as there are games I like on one or the other, I also never play online, that may also be a factor for you to consider. If it's a game that is available on both I always get the xbox version as it's a bit faster machine and I run an SSD with it and not on the ps4....yet. You can now with the latest update. I also run PS4 sticks on the xbox controllers as I find them to be a bit more to my liking....more grip. They are a direct swap...easy.
I also have the same TV as you....mine was a replacement from Sony for my beloved X930E that failed on me. I do not like the 900F nearly as much....but whatever.
Good luck in your quest.
All men dream: but not equally. Those who dream by night in the dusty recesses of their minds wake in the day to find that it was vanity: but the dreamers of the day are dangerous men, for they may act their dreams with open eyes, to make it possible.
T. E. Lawrence.