Other than experience, Edwards has bulked up quite a bit over the past two seasons. He's got the DT "gut" now if you will. He has also fine tuned his techniques under Krumrie. He may not ever be the run stuffer that SA is, but atleast he's a team player, can rush the passer.
side - Bike Mike played yet another very good game yesterday, and if you actually look at him you will also notice that the extra weight is gone and I bet he's back to where the team wants him.