Comparing Manchester to Juve right Now is just being dumd. This guys have been playing the same system for alot of seasons now, and slowly polishing details until everyone just knows what to do everytime, Juve last year was sometimes a mess. You could probably switch only Buffon.
If we compare Ferdinand with Chiellini, sure defensively on 1 on 1s they are about the same, just that Ferdinand has better passing, positioning and mental coolness. Same can be said on every position, they're players are more complete.
Juve can reach that level only if we stick to a certain system that works for our players, and continue to work with it. The Ferrara experiment really set us back a few years. Let's just hope we can bounce back on top now that Inter lost Mourinho.