Haven't read the whole Bey vs Rih ...who's more greasy debate (if that's what it is)
But I'd say both of them have a mixture of mess. There are times where they get all popped owt and sweet. and there are times where they dig downe and get ratchet with some bonafide knock.

I'd say 'fas is more guttah with it sometimes. Just a bit. That could be argued down tho. But they do the same thing to me. A good variety of "here's some mess for you White people" and "OK let's get down to bidness real quick" chunes.