I saw Gallagher and Marchand comparables when he was drafted. I believe our own scouts and GM leaned heavier on the Marchand comparable though.
In it's own weird irony and coincidentals, I believe Pelletier is less dirty scrum wise than Marchand, but he goes to dirtier areas like Gallagher more often.
I also don't believe he has the top speed of Marchand or many speeders, but his average speed is supposedly quite a bit higher than the average player, and even though he's easier to knock down due to his size, knocking him out of the play is apparently very difficult because he bounces back up and uses his edges to get back into the play. But honestly speaking, I haven't really sat down and micro analyzed these types of facets to his game.