Atlas Shrugged Fanatics discussion

This is my third pass of this amazing book (on MP3 CD). I will listen over and over until I think I have it all. I do have a question- what is the essential difference between Dr. Robert Stadler and Hugh Akston? Could someone tell me just what they *did* to differentiate from one another, and what *characteristic* made them do so. I know they were peers at Patrick Henry University and taught our favorite three characters. All I know at the moment is that Dr Stadler was "bad" and Hugh Akston was "good" but I crave some detail. Thank you in advance for any responses.

Stadler believed in big government and praised the creation of the State Science Institute. This, in Rand's mind, made him a statist and one to be feared and opposed. At the moment he praised the SSI he was on dangerous ground, but was still redeemable. But he had set his feet on a path that was leading to a bad place.

But then later he goes further down that path and gets much worse. He condones the dishonest and unfair smearing of Rearden Metal (via some nameless writer at the SSI), and plunges full-on with the looters in nearly every way.