That's true. Again, though, the difference is the overtly comical spirit in which Eminem does it. Compare 'Suicidal Thoughts' by Biggie to 'Just the Two Of Us' e.g.
Or maybe it's a question of how it's performed (or how it's received by me, a white guy). Like the Biggie line "Hail mary, full of grace – smack a bitch in the face!" I can imagine that playing as a comedy line but I've never heard it that way.
Then there's the Richard Pryor line Biggie borrowed about "she looks so good, I'd suck on her daddy's dick".