Neither.
Eminem is making this new genre; we'll call it rap emo. It's boring, how all he talks about is how much he wants to die, and how much he wants his enemies to die, the only hopeful thing about his songs is his daughter, Haley. His older stuff is pretty funny, though.
Fifty cent is just... blegh. All he talks about is bein' gangsta and keepin' it real, how many times he's been shot and all the hoes he be gettin'. Repetitive much? Jeez, he's like Panic! At The Disco, but a thundred times worse, despite Panic!'s being idolized and all. xP