E.g.: I run a Any% of OoT on the European Version - then I play on the Japanese version and get a better time, if obsoletion is ticked, my european run will be made obsolete and the japanese run takes it's place, if it's not ticket, both runs will be on leaderboard.

It'll then look somewhat like this (this is from the warframe leaderboard, only one I found that had someone twice):