They were closer, they weren't even. Nevermind that MacKinnon got that much PP time because he was our PP, without him the unit dropped to 7% while Toronto's PP was effective...albeit not as effective as the MacKinnon show...despite Matthews' absence from the unit. Plus Nate was by far the biggest reason why we spent so much time on the PP; as the kid could've drawn a call on more shifts than not.
So ignoring that massive difference and looking only at their 5 on 5 per 60 is simply disingenuous. As is your final argument. By that same token, if MacK plays like he did for a full season, then he's not a 90-100 point player, he's a 115+ point player. So the gap would still be massive even if we give both the benefit of the doubt about maintaining their best performances over 82 games
There's just no way to spin the gap between MacK's season and anything we've seen from Matthews yet, as light. This is like arguing that Dembele's performance for you guys was only slightly better than Puli or Sancho's...