2015 Lionsgate Blu-ray or 35mm scan for Theatrical Cut

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.

2015 Lionsgate Blu-ray (missing the Ultimate Edition with the T-1000 searching John's room and the happy future ending, which is on the 2009 Skynet Blu-ray, which is DNRed)

2017 StudioCanal 4K Blu-ray (and subsequent 4Ks) is 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.

Original Kodak/ORC CDS mix 5.1: likely on the Artisan DVD and other Pioneer Japan DVD.
Original Dolby Stereo SR: USA Widescreen LaserDisc and others.

Differences and review of the mix. There are earlier stereo mixes and many subsequent remixes on DVDs but it is unclear how many of them are really unique.

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.

Original theatrical render: 35mm scans or 1996 Disney Deluxe Edition CAV LaserDisc boxset

Digital render: 2010 3D Blu-ray

Original theatrical render: 35mm scans or 1996 Disney Deluxe Edition CAV LaserDisc boxset

Digital render: 2010 3D Blu-ray (every version since the 2000 DVD release including the 2D 2010 Blu-ray has animation errors. The majority of those were corrected for the 3D rerelease.) The 4K Blu-ray is merely upscaled from the 2K render.

Stereo Mix: 1996 Disney Deluxe Edition CAV LaserDisc boxset

5.1 AC3 Mix: 1996 Disney Deluxe Edition CAV LaserDisc boxset

5.1 DTS Mix: 1997 Disney DTS LaserDisc level corrected

The 1997 DTS LaserDisc is a virtually untouched transfer of the theatrical 5.1 mix and should theoretically sound the best being that DTS has higher bitrates than AC3. However, the original pressing of the DTS LaserDisc has an error where the right channel is 8.5db lower than the rest. This is an easy fix in a program like Audacity, and if you can find a corrected transfer, like the ones on various fan projects online, it should be the best sounding version of the film.

The AC3 audio on Side 2 of the CLV LaserDisc has the LFE channel muted. This was left intact for the CAV release.

The 2005 UK DVD has an error where one of the shots is brightened up way too high (when the rest of the toys hold onto Slinky as he clings onto Woody during the moving truck rescue). Plus the end credits are interlaced (the PSP UMD video is the only way to get that version of the credits without interlacing).

The 4K Blu-ray has a further remixed Atmos track.

OG: "4K80" on the high seas. If not, Disney 4K Blu-ray

Special Edition: "4K97_V" or "D+97_V" on high seas.

2027 Original Trilogy restoration/50th anniversary rerelease clips leaked plus release confirmed

OG: "4K80" on the high seas

Special Editon: "4K97_V" or "D_97_VI" on the high seas. If not, the 4K Blu-rays are generally considered an improvement over the 2011 Blu-rays. (although both restorations are DNR'ed and have issues).

OG: LaserDisc audio is the best option for the Dolby Stereo mixes. 70mm six-track mix is included in 4K80 (taken from an actual 70mm print). There are 16mm rips of the mono mix.

Special Edition: Cinema DTS or1997 LaserDisc for the Special Edition.

OG: "4K83" or "OTD83" on the high seas

Special Edition: "4K97_VI" or "D+97_VI" on the high seas

2027 Original Trilogy restoration/50th anniversary rerelease clips leaked plus release confirmed

OG: "4K83" or "OTD83" on the high seas

Special Edition: "4K97_VI" or "D+97_VI" on the high seas

OG: LaserDisc audio is the best option for the Dolby Stereo mixes (and usually included in fan restorations). There are 16mm/TV rips of the mono mixes.

Special Edition: Cinema DTS or 1997 LaserDisc for the Special Edition.