it'd never work cuz like Q said, people think U.K. heads accents make them wack, but to me, most of the U.K. kats are the ones that cover more of the deeper topics more often than my bone-headed U.S. brethren...
U.S. heads really only do deeper topics to be different from the crowd and throw in madd multies so they can get props for it, most don't do it to get better or be more creative...most U.S. heads here are run-of-the-mill ass rappers, not artists
Canadians, can't really speak on 'em cuz iono who's from Canada or not *shrugs*
lyrically, U.K. is better
mic prescence and emotion, U.S. is better
so it really all depends on what you lookat about a rapper, what makes 'em good to me might be what makes 'em wack to you...it's not about better or worse unless you have strict ass stipulations basically allowing hardly any creative freedom, it'll always just be related to PREFERENCE, not actual SKILL