Barcelona seems superior but you never know. I hope Barcelona will win. Messi and Mascherano are greater players than Tevez and more relevant for a team. But Tevez... I admire his ability to break a defensive strategy... alone. The number of "out of scheme" players is growing. It's like a new possition/hierarchy in a team. It's a kind of sweeper but from the attackers. Like the sweeper he's free of being in or out of the penalty area, he can play as a 9, 10, 7, 11, 8. I think he can rotate between positions in ephemeral time. Messi plays like that sometimes in Barcelona.
It's hard to define.