Wow, that's a tough one. I've used the 2nd two and never tried NWH (don't own it). Really, it comes down to what you like for the feel. I like Edy's and RCC. I haven't really thought about either one in terms of PUBG style. I think one of the biggest issues you will run into is letting people change seats, being able to shoot from a passenger seat, and making it so you can look at each other while in the vehicle. I've haven't gotten UCC to be able to have "full" control while in the vehicle as right now with my implementation I "turn off" UCC Locomotion and the UCC Camera. Also, since UCC doesn't have multiplayer yet, haven't tried that aspect. Also, I haven't updated the integration yet so that (1) if the vehicle is destroyed you are killed and thrown out of the vehicle, and (2) the ability to destroy the vehicle with maybe UCC AI or some other AI. Also, it would be fun to run over things and kill them, but I haven't set that up with UCC yet either.
So as it stands, I'm about to do a RCC integration (which should be super easy since I already did the Edy's one).
Do you have a link for NWH? I haven't seen or heard of it. Maybe I can email the author. I'm guessing, if it already has shooting, that you will need to modify that so it will work with UCC.
So, PUBG style will need more mechanics added like if the car runs you over, can be killed while driving, can shoot out the window while driving, can change seats, can heal yourself, can change weapons, etc ... And multiplayer...