Abbrederis is not similar to Welker,other than the fact they are both White. Abbrederis is probably faster in a straight line that Wes, but doesn't have the combination of quickness and short area burst that made Welker a threat in his prime. I'd say a better comparison would be a guy like Jerricho Cotchery who also plays out of the slot at 6'1 and about 200lbs. On ESPN's draft coverage, they mentioned that a concern over concussions was why Abbrederis wasn't taken earlier. He said he's only had one and that "it wasn't that bad", but other sources had told teams the number could be as high as five.
Aaron Rodgers can make most anyone look good, so if Abbrederis makes the team, I expect him to be productive for the Packers. Green Bay did take a wide reciever Davante Adams in round 2 and another WR after Abbrederis in Jeff Janis. So he's behind Nelson, Cobb, and Adams for sure and probably Boykin as well.
CC to Husker: I know you are a big weight room guy and Abbrederis only did 4 reps of 225 at the combine which was the 2nd lowest of all players tested. I am not a big believer in 225 reps for WR's, but I thought you'd find that interesting.