That simply isn't comparable. The landscape of European football was very different back then.
Who is United material? Unless you've been employed by a huge club with resources big enough to compete at the very highest level you aren't "United material" according to some people. People are feckin' funny, as they say. Moyes is a big no, 'cause he hasn't won any major trophies. Alternatively, he's a big no 'cause he has been content to remain at Everton - which is interpreted as proof that he has no ambition. We all know how bloody easy it is to be appointed manager of one of the very few teams capable of challenging for the major titles, so - yeah, he must be shite.
Pep Guardiola, on the other hand, is as plausible a candidate as they come. A man who was tailor made for the one gig he has on his CV. A manager who had the greatest selection of talents in recent memory at his disposal. And no measly transfer budget either.
Aw, feck. I'm not saying Pep isn't a genius. We might be better placed to pass judgment in a year or so, though. Point is, the average Internet feckwit knows slightly less about running a football club than one Alex Ferguson. Call me an idiot but I think it's quite significant that Fergie rates Moyes as highly as he does.