I don't know if Hud is better than Dan or even how good Hud is but just because he isn't at a power 5 doesn't mean jack. There are lots of great, great coaches at high school and lower college levels that never get the chance to move up or just like where they are. Same in any line of work. Just because everyone doesn't want to be CEO doesn't mean they are not good at the lower levels.
Mullen got where he did by riding Urbans coat tails and then winding up at UF as coord. MSU made Dan by giving him a shot and letting him learn on the fly.