The question you posed is subject to a major flaw. Currently right now, there is no other team in the world like Barca. I know that a lot of the success of a manager comes down to the manager himself, but also on the players and setup that he has. There's no point in discussing whether Enrique would achieve the same success, because he can't go somewhere else and have similar tools at his disposal. His current success is based on the quality of his tools, his planning and organizational setup.
This question would have been a lot more tricky if Enrique was managing a Sevilla/Atletico or a team of that level, because then we'd be comparing apples to apples. We could look at his impact on the team, and compare it to his potential impact at another similar club around the world with various factors like players and organizational setups being different while purely looking at his managerial tactics at both clubs. It's a balance, and at Barca right now, Enrique has that balance of managerial tactics and the right players to execute those tactics, and it shows on the pitch.
As for Pep, and his Bayern run. We also need to be fair. Pep is an amazing manager, with great players at his disposal, but simply put, Bayern are not Barcelona right now. As a unit, Barca is pretty much unstoppable when on song. That is no discredit to Pep. He's done very well with the Bayern he has, but we can't suddenly look down upon Pep's time because he didn't win against the greatest team right now. Let's not forget that Barca has arguably the greatest player to ever live, and some will say the future greatest player to ever live current playing on the same pitch. That will never be said about any of Pep's players except possibly Neuer.
