Corbin won't be > than Sloan until he has gone to the finals twice, and the western conference several times with different teams. However, that doesn't mean that Corbin can't.
As I look at it now, Sloan was really past his prime. His defense was from 15 years ago when the league had loads of dominant shot blocking centers, guards could be bodied up outside the 3 point line, and speaking of threes, only a few players could shoot the three at regularity. These are things he never changed his attitude on, and the league has changed, with athletic smaller centers, no touching the guards, and about two thirds of the players can at least hit a 3 in a pinch. Corbin has made these adjustments, he's forcing baseline instead of trying to force to his center, he's switching much better to defend the outside shot, and he said that he will use his 2's and 3's more than before (though I haven't seen this yet, but Ty also said he was not done introducing the offence yet)
If the Jazz make the playoffs, I can easily see Ty contending for coach of the year, though comparing him to last year isn't fair at all.