Skita, Dirk, and Andrea are the same type of player. Same style. That is what I'm comparing when I compare the three.
Skita is the worst case. Bargnani is most likely the middle ground. Dirk is the best case.
In terms of impact, I think Bargnani will have an impact much like Dirk did in his rookie year. His numbers won't blow your socks off, but he'll get valuable experience. I think whatever team drafts him needs to be dedicated to playing him.