4K Blu-ray

Plaion have also released a BD sourced from Arrow's recent 4K remaster, holds up strongly in comparison https://caps-a-holic.com/c.php?d1=19341&d2=19005&c=5415

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).

Included in the Complete Kubrick box set with FiM encode of the same master from the WB release without the filtering, 1.85 ratio restored for US Cut; both US and International Cuts are 4K.

No Blu-ray or DVD release until the Criterion 4K Blu-ray has presented the US in its original theatrical aspect ratio of 1.85:1. The International Cut has never been presented in it's OAR of 1.66:1 in any home video releases.

The packaging on the back of the WB 4K Blu-ray incorrectly states it as 1.85:1 when the movie is actually 1.78:1 as is the original Blu-ray. 

Radiance 4K Blu-ray is superior to Kino Lorber 4K Blu-ray, see mfunk9786 review:

Despite being at a considerably tighter bitrate than the Kino, the BD-66 from Radiance /Transmission is the release to own. Looks fantastic (FiM again), grain pattern is crisp, and the repeating scene error isn't on it, either. Really nice packaging that isn't as beefy as a Second Sight LE is another big plus.

Shout! Factory has good PQ, mediocre compression

Arrow 4K Blu-ray has a better encode than the Kino Lorber and Capelight 4K Blu-rays. Capelight 4K Blu-ray looks low-passed in comparison to the Arrow but is slightly closer to the Arrow in PQ than the Kino Lorber. 

The older Universal Blu-ray has a yellow cast (error) especially in the 1912 scenes.

The DV/HDR grade is tasteful and not overdone. SC has better compression, though not flawless; encoded by FiM, but Criterion also holds up quite well. Both releases claim to be approved by Lynch.

SC has a missing fade that Criterion reinstated.

The film was originally mixed in Dolby Stereo (matrixed LCRS). For the 4K restoration, this mix has been transferred from the original magnetic elements and remastered with Lynch's supervision. Unfortunately, the fidelity suffered in the process, with many sections ending up significantly less detailed due to a noise reduction pass. This track has been altered compared to the original, with reverb added to some dialogue, different ambient sound effects, changed panning, and extended bass.

For the unrestored mix, there are two major options, each with its own merits and flaws. The 2001 Paramount DVD, which I would say is the best well-rounded mastering, and the 1999 Japanese LaserDisc, which has noticeably better clarity and high-end detail, as well as better dynamics, but suffers from occasional distortion and has less bass than the DVD.

The LD also has some ambiance buried too low in the mix, and some dialogue panned more to the centre than the DVD. There are no content changes I was able to find. Unfortunately, I don't know what accounts for those differences.

The other available tracks all have more significant flaws. The Italian and Japanese BDs use the same base mastering as the DVD, but with some patching in a few shots. HD-DVD is sourced from an inferior transfer, the same as the Momentum DVD.

The 5.1 remix, originally introduced on the 2002 DVD, and carried over without changes to the 2009 BD is a light and mostly faithful remix, with fairly minimal LFE and surround use, but still potentially worthwhile as the only discrete track.