Mourinho is a great coach, but alex ferquson greater. Ferquson capable of producing great young players.
I think he's a good manager, but not the best. During her time as manager of Real Madrid, is often still stumbles especially in a game called El Classico. Several times he could not bring his team to beat Barcelona.
But try to compare with previous coach " He is much better and quality. And I'm sure he'll beat Barca in El Clasico Champion and the next.