I agree that the Bears do not have a superstar at any of the skill positions, but you can at least compare Olsen to Winslow, Berrian to Edwards, and Benson to Lewis. The biggest positional difference is QB. Also, the O-Line helps a lot of those positions look better. Bigger holes for RBs, more time for QB, etc.
OL is not a sexy pick, but at this point we just need to get the best available that fills a need.