Not sure why you focused on Larkin's speed from that whole comment, I wasn't comparing either Perfetti or Rossi stylistically to Larkin.
For what it's worth I also disagree that Larkin is a top 5 skater in the league. Top 5 fastest skaters, sure. But anyways, that's totally beside the point.
I brought up Larkin to show that often our consensus, draft-day opinions on players' ceilings are wrong.
It's pretty easy to say Larkin was "undervalued" with the benefit of hindsight, but scouts and writers pretty consistently had him ranked in the teens, and that was largely due to his perceived low ceiling.
My comment was in response to another comment that said something like, 'if both Rossi and Perfetti hit their ceilings, Perfetti is the better player.'
I disagree because 1.) You can never disprove that argument. Even if Rossi is a better player, this statement technically isn't "wrong" because you can just say that Perfetti didn't hit his ceiling. 2.) We're wrong about players' ceilings very often.