US

The 2.0 on the 4K Blu-ray is a downmix.

US Image Entertainment LaserDisc is pan-and-scan, but is the best quality release of the film. Widescreen version never released on home video.

US Image Entertainment LaserDisc has the original Dolby Stereo mix.

Germany DVD is a dupe-y transfer ripped from a VHS with German titles, PAL speedup, and mono audio.

Lionsgate 4K Blu-ray has the original stereo in lossy DD 2.0

> European/Australia StudioCanal 4K Blu-ray (better encoding on Lionsgate 4K Blu-ray)

Lionsgate 4K Blu-ray review / caps and packaging impressions by Kyle15.

For Blu-ray, Germany Plaion > US Lionsgate https://caps-a-holic.com/c.php?go=1&a=0&d1=14167&d2=14170&s1=144509&s2=144555&i=7&l=1

Italy or Japan Blu-ray should also have a better encoding than Lionsgate. Italy vs US caps

> US Kino Lorber/Germany Capelight - caps and audio comparison on this page. Discussion is still ongoing about the 2.0 but as none of the three 4Ks seem to have the true original mix, I think it's fair to leave them all in the blue tier for now and only note that Kino Lorber has the worst PQ.

The initial release of the Capelight 4K mediabook had some playback issues with Dolby Vision on Panasonic devices due to an encoding error, the HDR10 apparently works fine, see Capelight’s official response here. 

The 4K master has a shot at the very end of the movie (on James Caan's face) that looks incredibly soft and not good at all. This was visible on the DCP as well so it might just be a source issue rather than being the fault of Kino, Capelight or Arrow.

> US Kino Lorber see comparison and caps

Kino Lorber has an exceedingly poor encode, only slightly improved by the DV layer.

Universal's BD uses the same transfer as the old LaserDisc and sounds a bit better than Plaion's, which has worse dynamics.

Plaion's Atmos remix is tastefully done and preserves the original mix's characteristics, the 5.1 track on Kino's release is overly aggressive and unbalanced.

• 2015 Lionsgate Blu-ray (but it's missing the extra scenes in the Ultimate Edition)

• 2017 StudioCanal 4K Blu-ray and subsequent 4K Blu-rays are notorius for being heavily denoised and smoothened. Alternatively, 35mm scans for the theatrical cut is also available.

• For the Ultimate Edition with the T-1000 searching John's room and the happy future ending, the 2009 Skynet Blu-ray, which is the older pre-2017 transfer, but has DNR.

Differences of mixes on various releases: see thread and more info here.

2017 Blu-ray (which has the DNRed transfer), the 2009 Skynet Edition Blu-ray, and the 2000 Ultimate Edition DVD have exclusive extras. The 2003 Extreme Edition DVD has some exclusive easter eggs.

> Concorde Germany 4K Blu-ray, from nicwood:

Cohen has original SDR master, correct gamma, very good encode. Preferable to the Germany 4K with worse encoding, translated titles and fake HDR.

Fox 2002 NTSC DVD includes the original mix as discrete LCRS 4.0, later reelases only include a matrixed version an an inferior 5.1 upmix.

The matrixed stereo version on Shout! Factory's 4K Blu-ray sounds good.