I think that's an easy comparison that gets made but I see it as a lazy one. Not directed at you but I don't see Knight as a good person, I actually see him as a bad guy. The only good things I can say about him is that he graduated his players and was a great coach. What he is as a person though is a bully who turns on his kids. He lied about Niel Reed and got all the higher ups at the University and the whole state to turn on the kid. When the video came out he still tried to say that what people were seeing didn't actually happen.
It was all about Bob Knight to the point of him destroying the kids who weren't 100% behind him and creating a mob mentality where peoples lives were threatened. Years later when asked about IU he says he hopes everyone there is dead. Bobby was a brilliant coach but he strikes me as a pretty sick guy. The special left me feeling really sad about humanity. We see this mob mentality play out over and over when a beloved figure to many has their dirty laundry shown to the public.
Sorry for the long response but I hate bullies.
I met Jim Calhoun only once. It was a few years ago. I was a bit nervous because the guy brought so much happiness to me over the years through his job, but I certainly knew he could be salty. I didn't want my positive memories tarnished. First I randomly met him in an elevator heading towards the alumni event. He was genuinely nice to everyone despite not having to be "on" yet. At the event, he made sure to talk to everyone and take pics. Not just a "hello" but he really wanted to be part of the conversations. This will sound hokey, but you could see that he's a good guy in his eyes.
JC reminded me so much of the "Good Will Hunting" characters. Quick to start a fight, maybe even with his buddies, but if you are his guy NOBODY else could mess with you. And that included a crazy drive to beat everyone that wasn't his guy. That turned people off because they weren't his guy. They respected him, but they also feared messing with him. Guys like Bobby Knight use fear in all (most) of their interactions/relationships. He's the quintessential bully. Of course he could show a heart and had a circle of people that he was close with, but that's an exception, not the norm.
Re 30 for 30 and someones comment above about their wife, ESPN does a great job on these. My wife doesn't like many sports and she loves most of the 30 for 30s. They are certainly worth watching.