KillBill: Great use of references. Fairly chill with a commanding/confident approach. Lyrical content was a step up. Flow was steady.
Senator John Dean: Delivery! Dynamic flow. Definitely skilled.
KillBill points for lyrics, style/character and presentation.
Senator John Dean points for direct shots, intensity and presence.
These "grudge matches" are a bit tough to decide; being that only one MC is given a response opportunity, the latter MC gets a noticeable advantage. Maybe 8 bar accapellas, to end it would be cool :D ?
But, I'd say KillBill for the win, his verse had better flow in the shot delivery; relevant progression in the combo. Senator hit with some harder hits but I thought his verse was more sporadic and the KillBill movie line was weak and forced. Fat Ass beats Butthead by a shoe string.