the best player in q4 on xbox can't match up with any of the amateur or professional players on cpu-q4, those guys make a living out of organised tournaments, the professional players acquire sponsorships and the better player usually takes home between 5k and 20k USD each tournament (held every 3 months)
q4xbox is basically not even q4 and without a competition mod, why bother asking who's the best
there's no decent duel maps, there's no mentionnable crouch-sliding, strafe-jumping doesn't even exist in this game, so what difference does actual skill make?