No way, Carpenter is smarter, is a hard worker and is more disciplined than Arrington. Plus, Arrington does not fit in the 3-4, Carpenter fits perfectly.
According to Frank Coyle of Draft Insiders Digest. He said that he is similar to Chad Brown and Julian Peterson.
This is a small quote from Frank Coyle on him.
He has a huge upside as a pass rusher and could be a monster attack 'backer in either scheme, but expecially in a 3-4 set. His similarities to Chad Brown in size, athletism and versatility will allow him to fill many roles.