He's a tricky player to comp because there's still a rawness and Bambi-like clumsiness to his game. At this point, he reminds me mostly of ex-King Alexander Frolov with some James van Riemsdyk, young Alex Nichushkin, and a little Jeff Carter all blended together.
I would love to say he's comparable to a Rick Nash or Ryan Getzlaf but he lacks their "smooth-as-butter" shine they had as draft-year prospects. Watching him and tracking his progress, I see some shades of Michael Dal Colle there, but feel teams will gush over his size and rawness, believing they can dev him into the next elite, big-bodied winger.
While I feel he'll end up a nice player, there is some "boom or bust" at play if a team is taking him in the top 6-8. If he drops to NJD at 10 or Philly at 12, I think there's great value there, but if a team passes on a Demidov or Buium for him, they will look like circus clowns in 4-5 years.