Tiebreakers in T1 Valorant leagues

Does it depend on round differential, map wins/losses or something else entirely? Can someone kindly explain it in detail? Thanks!

it's h2h, map diff, and round diff

but on a 4+ team tiebreaker it's map diff andthen round diff

https://pbs.twimg.com/media/FwGEiBpaMAAXoz7?format=png&name=small