They are both maniacs, but different kinds of maniacs. Cronin seems to always be pissed off at his players. Hurley seems to always be pissed off the refs.
When Hurley isn't yelling at the refs and having to be restrained by his assistants, he is rolling his eyes and using a variety of other gestures to demonstrate his disbelief of every call that goes agains UConn. He seems to always be treading the line of getting a technical.
While I would much rather have Hurley's record of success, I prefer Cronin on the sideline.
Of course those are not the only two options for sideline demeanor.