I used to play PUBG and I didn't really get fortnite when it came out. Having played both, I personally prefer Fortnite. It's distinct and original look at least makes it nice to look at when you gotta do a lot of running, unlike the brown and yellow blandness that is the PUBG map. Both gameplay is very similar except for the building overall (which either adds a layer for you or pisses you off).

I think because Fortnite is more chill overall, I get less angry with it and makes me want to play more. The win flowchart for PUBG is just-

"Do you have a sniper?"
No

"Are you dead yet?"
No

"Repeat until you've won, died or became a chinese hacker".

Whereas snipers aren't as bullshit in Fortnite so I can actually be happy with having a shotty and assault rifle rather than being limited to pretty much one weapon :/