I hate the Battle Royale genre in general.
However, when it comes down to it I'm gonna throw my money in with Fortnite (its a joke get it, because the game is free). Mainly because it seems that whenever Fortnite is mentioned the PUBG brothers start losing their stuff and turn into animals. And the devs of Fortnite are constantly updating the game so it never really gets "too old" if you know what I mean.
On top of that PUBG is dead as hell on the development side as far as I can tell. Sure there are still people playing it but you can tell the devs completely said "forget it" and gave up on updates. I mean forget, it is actually an official game now. It is past 1.0 on PC and is no longer in EA. That literally shows the dev doesn't give a single stuff about his game with how many game breaking bugs are still present.
I know it seems like I care, but Fortnite is winning and for obvious reasons. More and more PUBG players are switching over as well. Like I said, I have played both and hate them near equally.