A lot for sure, but the biggest difference really is keeping the play alive offensively.
Its crazy how anytime the puck is cycled to the point, the puck is dead. Its either a bad shot to the crest that is saved for a whistle, a poor dump in the corner that ends up on the other stick, a block shot, etc.
This is why I say its the worst defense Ive ever seen from the Habs.
Even when the Habs had guys like Barberio, Campoli, Diaz, Schlemko, etc who were all horrible players, they at least had the minimum IQ to just keep the play alive and not do anything else. Then you couple this with Subban and Markov or Petry and an actually good Weber...
I hate everything about this team.