I don't think either Koltsov or Lisin have "hands of stone." Koltsov has shown some flashes of brilliance, and was pretty effective offensively in the games I saw of him in the AHL playoffs this year. I think it may take him some time for his hands to catch up with his feet + the speed of the game at the NHL level.
Lisin is rated as the best natural goal scorer in the draft by RLR. The knock on Lisin seems to be a lousy work ethic and no discipline to play defense. THN says he somtimes cherry picks at the blue line.
He's a boom or bust prospect who could fall out of the first round, I think.
Edit: and other than the fact that they are both fast, I see no comparison between Lisin and Koltsov, really. Koltsov is a pretty good defensive player from what I've seen, and if nothing else, he gives it his all every single shift.