I acted on purley benefits, since I didn't really want to kill either of them. I decided getting Playboy x's crib would be a lot cooler then Dwayne's sh!tty place. Plus you get the GTA 3 outfit in Playboy's wardrobe. Also if you let Dwayne live, you can be friends. Even though all he does is complain about how crappy his life is, he will send 2 guys to help you on missions, and that can be a big help.