I was never very high on Virtanen, that might be why I feel more disappointed with Juolevi.
When I look at Virtanen with the Hitmen, I saw a player that was physically more mature than his peers, and so that made a difference in him producing in the WHL. But when you actually look at his production, he had that 1 good season of 45 goals in 71 games, and a PPG. The other seasons he was at most a 30 goal scorer ... in the WHL. Not sure why people expected him to score 30+ goals in the NHL. I figured 20 to 25 goals would be his absolute ceiling, but he didn't even reach those numbers.
With Juolevi, I saw a #1 defenceman that anchored the blueline for the Knights and the Finland teams. He had all the tools to be that bonafide #1 anchor defenceman. He simply couldn't translate it to the NHL (injuries had a lot to do with it). I felt Juolevi's ceiling was much higher than Virtanen.