Whenever I made fun of Pelini to Nebbie fans, they always bring up Fran. While there is a facial comparison, I think the difference is that Bo was not overly bright and was sincerely angry at the refs and the media pretty much all the time.
Part of Fran's antics are an act. I am not saying he does not sincerely get mad, but he is often doing so in a calculated manner to fire up his team and persuade the refs. You rarely see Fran blowing up in post-game interviews or pressers. And, he is generally a fairly intellectual and mild mannered guy with the media from most interactions I see. Has he embarrassed us a time or two? Sure. Is he an embarrassment like Pelini was? No way.