Xbox is more backwards compatible, the whole "easier to jump in if you don't have an established past with them" is taking Sony's lack of maintaining a feature and acting like it's an attractive selling point.

Sony has some great first party exclusives, Xbox has some greater utility that spreads back to older generations, the PC, and a multi use controller that connects to PC and smart phones easily

Both are always comparable, play the one where your friends are at the most.