OK, I just got the 1080i Sky Director's Cut rip off Usenet. Out of both HDTV versions (the DC, and the theatrical cut which I only have in 720p) this is definitely the closer of the two to the 35mm print I saw last night. It has that kind of blue/orange or cyan/orange tendency in a lot of scenes, just like the print - though it is a bit brighter and less contrasty, probably owing to being from a low-contrast, early-generation element? But it definitely doesn't have the "neutral" more pinkish-red look of my HDTV theatrical cut (which I still theorize might have been what the original DVD was derived from - some transfers done for DVD seem to have been future-proofed by actually being transferred in HD and then downconverted, I know the 1999 Ghostbusters transfer also turned up in HD).

There are still differences, though. For example, we see Spock's torpedo blast out of the Enterprise, both HDTV versions show the trail as a pale yellow, while the 35mm print had the torpedo trail as a saturated golden yellow-orange. (On the preview clip of the 35mm scan of III, that shot in the prologue shows the same saturated color to the effect; that's one of the reasons I say the colors seemed to basically match between the 35mm of II, and the prologue on the 35mm scan of III.)