Essentially, Joker and SGA are 1-2 in almost every single advanced stat category. The Thunder and Nuggets are basically tied in the standings (OKC 1 game ahead in the loss column). I don't think you can really pick a winner at this point - it's going to go down to the final week.
My inclination is, OKC will care more about finishing with the 1 seed, so you'll see SGA make a push towards the end.
FWIW.....Vegas has Jokic as the favorite at -550 to win, while SGA is currently the second highest favorite at nearly 6-1 odds.....that is a MASSIVE disparity, so I would be surprised if SGA ends up the winner. Not saying he isn't deserving, just that at least Vegas thinks the voters have probably made up their minds.