There is no need to put Izzo down to say that Beilein is a great coach, and probably a better one at this stage of the game.
Izzo has a great record with all those conference championships and final fours. No one can argue about that. As of now, it's not clear if he is slipping as a coach, or if he just slacked off on recruiting the past couple of years. If the latter, he may be back before we know it.
Not knocking Tom Izzo, but Beilein is very impressive in the way he develops players and designs strategies to get the max out of them.