Guardiola played for many years under a system that Cruyff set up, he was taught this system every day. He then coached that same system to a team of players who had been coached in that very same way for years previously. He brought a few players in, one of the most prominent of those was Fabregas, who, when younger had grown up on that style of coaching. I'm not saying that he never did a good job, or that he is not a good coach. What i am saying however, is that he would find it immeasurably more difficult to turn up at a club in England, and turn that club into his style of football. I am also unsure as to whether he could adapt his style sufficiently in the formative years of being at that club to grind out the results needed to keep him at a club for long enough to change their ways.
The entire set-up of Barcelona has led to the success of Guardiola, rather than just his own talent or knowledge. Tito Villanova will also, i am sure, be a very successful coach at Barca, but how are they playing differently now to how they did 18 months ago?
It is the ideals, systems, methods and the beliefs at Barca which make them successful, NOT the individual coaches.