Films

This disc defaults to a lossless 5.1 remix, however in the setup menu, the original mono mix is included as a lossy alternative for the first time since the dawn of home video. The film was given a stereo remix very early on and remained stuck that way for decades.

Eureka release has a better encode, but is taken from an older master. The Criterion Blu-ray was a new restoration from the ground up, and is substantially improved despite not being as well encoded.

For physical release, Criterion and Sony Blu-ray are very similar

4K Blu-ray is missing featurettes from the old Blu-ray

Warner Bros Blu-ray is the best Blu-ray even though it has color and major contrast issues
4K SDR master on streaming seems to be from the same scan and looks like it has less tinkering than the Blu-ray
Caps of 4K SDR master: 007 on Home Media: On Her Majesty's Secret Service (1969)

All other discs are from a 4K restoration, overcropped in an attempt to stabilize the images, with very washed out colors. https://slow.pics/c/cOUtJde0

Spain Selecta Vision 4K Blu-ray > other releases and old 2006 release - impressions of Selecta Vision release

Comparison of extras between different releases:

https://dvdcompare.net/comparisons/film.php?fid=999
https://dvdcompare.net/comparisons/film.php?fid=9670

Russia Sony Blu-ray has a superior 24-bit Dolby TrueHD 5.1 original mix compared to the 16-bit LPCM 5.1 on other Blu-ray releases and the 16-bit DTS-HD Master Audio 5.1 on the 4K Blu-ray included with the Dolby Atmos remix.

(caveat: no English subtitles for Mandarin/Cantonese dialogue)

German release from Plaion has better grading and encode than the US Vinegar Syndrome releases.

Both UHDs come with Italian and English audio, as well as English subtitles.

4K Blu-ray has Atmos remixes with new effects and changes. The original matrix surround track is somewhat different in its mix than the 5.1 discrete but relatively the same.

4K Blu-ray has Atmos remixes with new effects and changes. The original matrix surround track is better mixed than the 5.1 discrete with more surround and low end engagement amazingly. It also hides the extensive ADR a bit due to the inherent quality dip comparing matrix to discrete formats.

WB 4K Blu-ray but has MAJOR Color Timing issues. All cold blues are rendered teal. WB Blu-ray despite issues is a purist visual option in this regard.

First ever Dolby Digital 5.1 wide release film. 4K Blu-ray has new Atmos remix which replaces original sound effects and prioritizes music and bombast. A terrible audio experience to be avoided. 1997 WB DVD has open matte version on flipper disc. VHS also is open matte.