As the title says, different world, same jokes. This comic, of course, refers back to the previous impersonator comics.
I think when you're dealing with an alternate dimension, the personality trait that gets switched needs to be the personality trait that's most important, the trait that primarily defines a character. In the case of Mega Man and Bass, I think that would be their stupidity. In Proto Man's case, it's probably his confidence, his intelligence, his suaveness (which I'm counting as all one thing), so that's been flipped, and he's an idiot. I suppose that also means that I consider George's peaceful nature to be his most pronounced, which is why he's become ultra-violent instead of stupid or even necessarily smart. Hmm... I wonder if Alternate George hates ice cream...