Kerr said that Durant is their best player, pretty much every pundit rates Durant higher than Curry, and Durant got two final MVPs.
It is Curry's team in the sense that he was there earlier, but Durant is clearly Dubs' best player and second best player in the world.
It doesn't matter though. Him and Curry seem to have a great relationship, in the final game, Durant was actually trying to give to Curry the final MVP, and he tried to brush of when asked about him winning final MVP instead of Curry with 'does it matter, it is a team's game blah blah blah'. I don't remember a better partnership. It has always been a clear No.1 and No.2 (Jordan-Pippen, James/Wayne, Kobe/Gasol) or two very near No.1 not liking each other (Shaq/Kobe) but here it seems that all they want is to win rings, and who is better isn't one of the things they care about most.