Yeah, I pulled out the 40th Anniversary Blu-ray and there is noticeable difference between that Blu-ray and the current iTunes HD digital as I compared the opening title sequence on both of them with the same OLED display.
I just look at my iTunes HD digital and the car and opening credits are definitely more reddish than your posted screen caps. I haven't looked at my 2009 Region "B" Paramount Blu-ray yet. Anyhow, I'll be purchasing this 4K release.