Personally, I don't feel that Man U looks better on paper. At
least, that's what I feel. Especially since I feel Arsenal's
younger players would have more energy to last the long
season.
Man U has young players too, but Arsenal's young players have
already been playing in the team and in the premiership. Man U is
still rather reliant on players like Scholes and Giggs. Man U's
performance is less convincing when these two are injured and last
season, they had to rely on Ronaldo and Rooney to carry the game
(more of Ronaldo actually).
This time round Man U has Tevez, but from the two Man U matches
I've watched this season, Tevez does not link up well his
team-mates. Not yet anyway.
Arsenal would do much better if they had a better keeper though.
It's definitely time to drop Lehman and I personally have doubts
about Alumnia being a long-term solution.