It varies from title to title and from ear to ear. There's no guarantee that you will prefer the presentation/mastering on any given CD. One of the "problems" (or the benefits, depending on your point of view) with many of the early MoFi Gold Discs is that they mastered them at extremely low volumes, following the then-recommended practice of leaving 10 or so db of headroom for the loudest peaks. Many early MoFi's will sound *a lot* quieter than most modern CDs.
The Steve Hoffman-mastered DCCs don't have this problem, and most of his work is considered the best that these albums have ever sounded on CD. But again, taste is a personal thing, you might not like the sound of any of the gold discs.
BTW: the fact that gold is used in the manufacturing process has *nothing* to do with their sound quality, gold is only used to create a disc that will have a very long life (and as a blatant marketing gimmick). The sound quality comes in with the use of good mastering engineers, who will treat the tape with more time, care and respect, than they otherwise might on a standard CD issue.