let me clarify what i said earlier. in my opinion, when masch plays as a cb for barca he is mentally restrained for many reasons, first, he isn't a natural CB and i'm sure it hinders his game, second, he knows he'll never be considered a leader here, like he is in argentina, simply because he's not catalan, even tho i'd gladly accept him as a leader, the club wouldn't. there are many other reasons. but if i were to compare masch in argentina and masch at barca, it would be like comparing a free wild dog with a tamed dog who has accepted his role. masch is just as dedicated when playing for barca, i'm sure of it, because he is a professional and a 'dog' with a heart, but he isn't a beast because of the limitations he's feeling here. on the other hand, bartra looks more like a leader, he shows more balls, because he knows he's THE cb, he was raised here and he tells himself everyday that he has to prove something.