Really, bro.
Carricker wasn't 300 at NU, he wasn't even that at his first NFL camp. I think he also played DE almost exclusively in college. He was super effective there, and stinks to high heavens as a UT in St. Louis. I've gotten the "pleasure" of watching him because I live in this terrible football market.
Suh, on the other hand, is a true DT. He has the frame to bulk up slightly and play NT in a 4-3, which Carricker isn't even close to. Suh could be playing at 310-315 or so in the league, maybe even bigger if that team needs him to be. Carricker hasn't been the same since he was below-290. And there's a big difference between 6'6, 296 and 6'3, 305 which Suh will probably be at the Combine. Suh is much stronger against the run than Carricker. He's a much more rare athlete, even though Carricker graded out nicely at the Combine. Suh has the upside to be an impact pass rusher in the NFL, Carricker doesn't (at least on the interior).
So they played different positions, Suh is a much better prospect (could have gone top 10 as an underclassman), stronger, quicker off the snap. I think Suh compares, again, very closely to Kevin Williams at Oklahoma St, where as Carricker is an over-sized end in the mold of a Charles Grant. I don't think Williams and Grant are very comparable either.....