If c9 Wins Champions? As we know everything is possible from now on.
First part of your statement is essentially true, barring any weird bracket occurrences or unforeseen circumstances (whichever team wins champs is the best team in the world).
But regions are made up of many teams, not just the best team in the region, so the second part of your statement is categorically false. If I use results-based analysis as you did in your comment, then clearly EMEA is stronger because they have 4 teams in the playoffs while NA only has one.