The only similarity he has with Gradowski is that he is a short QB at around 6'1 and played in Ohio.
Smith has an very strong arm and throws a wonderful deep ball. On top of that he has appeared to be as coach-able as they come, and his mechanics rarely become sloppy. He keeps his eyes down field when hes under pressure and has shown a good feel for how to be a successful passer. I'm still trying to formulate an opinion on his leadership abilities, but from what I've seen in the past few years he definitely knows how to get hyped. We all know what he can do with his legs, but he has proved to be a pass first guy. McNabb is a good comparison.
That being said, from the Dolphins perspective, we shouldn't even think about him unless he somehow falls to a round he shouldn't.