It would seem that any rational comparison between Kakko, Hughes, and Dach need to wait perhaps 3-4 years. After that, then compare them. People grow into their game at different rates and with completely different teams and roles on their teams - so it is way too early to compare them meaningfully.
Now, if the idea is to say that Dach looks promising, sure. he has. The other two do as well. If the idea is to say that Dach has at least as reasonable chance to prosper in this league as the other two - one could say it so far appears that way. But still lets compare this all in 3-4 years. By all rights, in terms of draft order, Dach should be behind the other two ultimately (albeit close). So, far, he is at least their equal. So far, so good.
Glad we have Dach. Not sure whether he will be better than the other two or not - could be, I would not be surprised. I would also not be surprised if all 3 turn out to be really good. Also, one or more of them may rise up above one of them; that too would not be surprising. Too early to tell.
What does seem clear though is that Dach looks good. We'll see what follows!