yeah Em always murders people on their own shit, as Nas put it  "Renegade" is absolutely sick. and yeah i've heard the Benzino disses. like Nail in the Coffin the best  rhymin' "industry" with "in the streets" and "What the fuck you stop for buddy, if you slew some crack/You'd make a lot more money than you do from rap." he's a sick battle rapper  that's how he got known in Detroit in his early days after all.  

 the only thing is that he's always got in feuds with people he can easily destroy (with the possible exception of Canibus, but i haven't heard enough of his stuff and don't plan to) but i guess he hasn't really got any reason to diss anyone skilled. i can't think of an acclaimed rapper who disrespects him after all.