I tried PUBG and liked it as I played DayZ, H1Z1 (and king of the hill) as well as the Arma 3 mod Battle royale. It follows the same feel, very tense and exciting. One thing I don't like about PUBG though is the amazingly steep learning curve. I am good at shooter games, and have plenty wins in other Battle Royale type games but PUBG is reaallly hard (for me apparently).
Fortnight Battle Royale is awesome, its got a lot more casual feel to it, and unlike PUBG, deaths don't feel like you've wasted the last 30 minutes looking for an AK just to be shot by a noob with a pistol. Fortnight BR is a lot faster in terms of rounds starts and getting loot, with firefights happening a lot more readily, there is camping obviously, but people are less afraid of taking fights and that makes the game, for me at least, a lot more exciting than PUBG.
Also, Fortnight BR runs on a potato at 60fps, PUBG doesnt quite get there on decent systems