Green plays a lot bigger than 6’6” like Justin. Good comparison.
It's a valid comparison in terms of both players being undersized forwards with underwhelming athleticism. Of the two, I think it's pretty clear that Champ is the superior athlete. However, he's miles behind Draymond when he was drafted in terms of his ball handling, passing, defending, etc. Draymond's only issue in the eyes of NBA scouts was his limited athletic profile. Champ has massive gaps in his skill set where he just isn't NBA calibre in a particular facet. Draymond didn't.