When people mention strength of schedule vs production with regards to Rossi/Perfetti, this is what they mean. Rossi beat the hell out of the bottom teams. Perfetti and Rossi each played 22 games against teams that were sub 0.500. In those 22 games:
Rossi had 63 pts or 2.86 PPG or a pace of 195 pts in a 68 game season.
Perfetti had 43 pts or 1.95 PPG or a pace of 133 pts in a 68 game season.
Conversely, Rossi only played 12 games against teams 0.600 or better (usually contenders). Perfetti played 24 games. In those games:
Rossi had 14 pts or 1.17 PPG or a pace of 79 pts in a 68 game season. (HUGE drop)
Perfetti had 41 pts or 1.71 PPG or a pace of 116 pts in a 68 game season.
Also for the season Perfetti had better numbers for zone entries (7.61 per game to 6.55) and zone exits (4.9 to 4.23). And those exits were done via the pass at a higher rate than Rossi (48.10% to 37.50%), which for two guys with average skating, would be important. (Credit to dobber prospects here:
https://dobberprospects.com/draft-class-deep-dive-cole-perfetti/)
Perfetti has adapted so that despite having average skating and defense, he can still get the puck out effectively, consistently enter the zone, and produce offensively no matter the opponent. Rossi’s more defensively sound but offensively his production was heavily reliant on the large talent gap that exists between top and bottom junior teams. This kind of gap is much less pronounced in the NHL. I think both will be NHLers but Rossi is a decent two way winger that tops out around 45/50 points and Perfetti is an offensive catalyst at wing good for 75/80 pts.
One of those two things is going to be more helpful in rebuilding that the other IMO.