He did? From what I saw, Moyes was largely trying to replicate Fergie, but just made everything seem different because he wasn't very good at it and paled in comparison to SAF. He went for a fairly similar style, we used our wide players a lot (not effectively, mind), and he didn't particularly shake things up all that - his big summer signing was Marouanne Fellaini. I expect the players were probably respectful, if not in awe of him, at first, but as time progressed they became disillusioned with him because they just knew the guy wasn't good enough for the position he'd been given.
Giggs wouldn't be disrespected per say, but if Moyes' managerial CV meant he wasn't respected by the players, Giggs would be laughed out the door.
In general on the whole Giggs/Guardiola comparison, the difference between us and Barca is that they seem to be very efficient with their in-built La Masia system, and seem better equipped to appoint someone from within the club. While we've got a good record with youth, our record isn't recent years doesn't compared with theirs. I'd like to see the club trying to build to where we could appoint from within, but I think it'd have the potential to be very messy if we did it at the moment, and could end badly.