If Nyjah has a good day, which he normally has, he's gonna win.
If he doesn't have a good day, then Yuto might win if he's the one having a good day.
If they're both having good days and are dialed in, Nyjah takes it imo.
With this said, we saw how Yuto won in Rome, and if he trains a few gnarly rail tricks before the Olympics start, he might have a chance. Let's see what Nyjah and Yuto bring to the table.
Personally I'm rooting for Yuto, but don't mind Nyjah winning either, but I can't see anybody else taking it from those two.