I think those 8 people would say Carrick because they are more aware of him than they are Morgan. I didn't see every Man Utd game last season but I bet most people saw a whole lot more of Carrick than they did Morgan and that kind of works like advertising.
Based on what I saw, Morgan had the more impressive season last year but if you ask me who is the better player I would say Carrick. He's rock steady, calm, always appears to have loads of time on the ball and simply doesn't give the ball away. I like that, but I like Morgan too and if he can perform as he did last season for the rest of his career then i'd probably have to rethink my opinion