I can say so far that Krit is definitely a better rapper/producer than Cole at this point.
I would even say Krit can rival Kendrick in lyrical ability as well.
I personally think he's a better rapper than Cole based on his voice alone, and the fact that he doesn't sound like he's trying to hard when it comes to spitting. And he's far ahead of Cole as a producer, that shouldn't even be a debate.
As far as Kendrick, the only difference between the two is that Krit doesn't have any songs where his voice is an outright nuisance to listen to. You won't hear Krit sounding like the male Nicki Minaj at any point in his rapping, thank God. And that's not knocking Kendrick either, as him limiting that shyt on GKMC and DAMN is what made those albums so good.