Of the Mike ones, I have to say Hobgoblins or Space Mutiny.
I've always thought that the two hosts were way too different in their styles to be compared fairly. They each have a different relationship and a different wit. Joel created the bots, he's their dad. They look up to him and respect him, and he's got a very droll wit. The bots constantly pick on Mike and don't really respect him, so it opens up a whole new aspect to the dynamic. He's also more sarcastic in his wit. It just depends on your tastes.