Teams mostly play inside their own region, so their records are not directly comparable — a dominant record in a weak region means less than a middling one in a strong one. International events are the only place the regions meet, and those results give you a conversion factor between them. You maintain regional strength ratings from cross-region history and trade the early rounds of international events, where the crowd is pricing domestic records at face value.
Markets on Polymarket where regional strength & cross-region seeding priors is the natural play: