I'm referring to an original 1958 dye-transfer print. It had quite a bit of film artifacts, but the colors still looked absolutely fantastic.

The 70mm print that runs at the Castro, which I have seen, is from the 1996 restoration. It was my first theatrical experience watching Vertigo, and it honestly looks quite nice. The superiority of 70mm over 35mm detail-wise is very evident. About 38 years younger than the dye-transfer print I saw, it was much cleaner, artifact-wise. Nevertheless, over time, it too has accumulated some dirt.

The colors on the 70mm are more accurate than home video transfers based off of the 1996 restoration would have you think. The transfers are paler than the prints, and the grain structure is quite odd. I think, though I might be wrong, that Lowry Digital did the scan in 2004 when their process was still very imperfect. Strangely enough, the letter-writing scene looks terrible in the 70mm print, which was noted in contemporary reviews for the restoration.

To answer your question, though, it unfortunately does have the infamous 5.1 remix, which, for my money, is the worst remixing job for a movie ever done.