By the numbers, Matta clearly was better than Beilein. Better record overall, better record against Michigan, better recruiter, and no worse than a draw in the NCAA tourney.
This kind of was hinted at in the article and some of the thread, but here's the key question, imhe. You have to ask: at the end of their time respectively, did the fans and teams and schools want them to stay? Was OSU looking forward to many more years of Matta, and Michigan looking forward to many more years of Beilein? I can't answer definitively for OSU. However, without a doubt, virtually no one at Michigan wanted Beilein to move on. Not the fans, not the AD, not the players, not the incoming recruits. We were all looking forward to at least 5 more years with coach Beilein, and to many more NCAA tournaments. We were hoping that his development success would lead to more bluechip recruits, and that Beilein would finally have the basketball talent needed to win the whole NCAA tourney. (And Beilein was too classy to ever complain, but Michigan was jobbed in the 2013 NCAA Final. Louisville had to vacate wins, and the refs call a critical mystery foul against Trey Burke that both commentators and Louisville knew was bogus. Smh.)
IIRC, 11W, among many others loved Matta, but believed he needed to go at the end of his tenure. It was an awkward situation. You would never want to fire Matta. But at the end, recruits weren't lining up to play in Columbus, for Matta. He wasn't having sterling success. No one at Michigan felt that way about Beilein. Our loss, your gain.