In a diss OR a live battle, Em would destroy Tech. Tech can make music, and rap fast, but he doesn't have the variety of delivery, style, content, rhyme scheme, or ANY of the shit that Eminem has. If you actually STUDY the lyrics of those artists, there are few that can fuck with Em lyrically. And those than can can't fuck with his delivery. And those that CAN fuck with his delivery, can't fuck with his production. SERIOUSLY. No one single person can touch him in EVERY category. I have yet to see ANYone. I LOVE me some Tech N9ne, I listen to him more than Em, but that doesn't mean he's better.