DNR

No comparison available 

See DVDBeaver for the whole fiasco but Kino Lorber's main feature was a DNR mess but it fortunately included the "raw" version. VCI initially had a bitrate < 10 Mbps but have sent out new disc with bitrate around 35 Mbps.

UCLA has a new restoration done in 2015, but no release yet

Only VCI has optional subtitle and commentaries, while Kino Lorber doesn't

France Movinside Blu-ray although has contrast boosting, still better than Kino Lorber's aggressive DNR caps

The Library of Congress HD Streaming has very heavy DNR compared to NFPF and very muted colors https://www.loc.gov/item/2023600635/

Disney UK Blu-ray or bootleg 35mm scan having less DNR and digital repaint/recomposit

UK BFI Pioneers of African American Cinema boxet Blu-ray or US individual Film Masters Blu-ray no comparison available

Specifically the BFI boxset is better than the Kino Lorber boxset as you can clearly see the DNR in Kino Lorber http://www.dvdbeaver.com/film5/blu-ray_reviews_73/pioneers_of_african-american_cinema_blu-ray.htm

Puppetoon Productions Blu-ray link is 4K scan of Original Camera Negative while has some degree of DNR is still a significant upgrade over previous release

New 2016 Pathé France 4K transfer Blu-ray > Criterion/Second Sight with old transfer heavy DNR https://slow.pics/c/z8p3fR0G

Puppetoon Productions Blu-ray is 4K scan of OCN while has some degree of DNR is still a significant upgrade over previous release

Paramount 4K Blu-ray. See caps
HDR/grading: nice, but some blown out
Encoding: inconsistent, smeared motion
DNR: inconsistent, frozen
Old Paramount Blu-ray is arguably a solid alternative choice

Paramount 4K Blu-ray mono is different version of the Blu-ray mono from the same old 2000 DVD transfer.

The 5.1 remix on the 4K Blu-ray is an appalling remix done by going wild with artificially generated stems from Park Road Post who were given the surviving mono to separate. The experience is jarring and fidelity to original mix in terms of level balance, directionality and impact is nonexistent. Not only does this sound painfully weird, but the Paramount mixers then did whatever they wanted in terms of LFE, sound pans and effect changes.
The original mono mix was not restored and still needs it badly. The 4K master is filled with frozen grain examples coming and going plus some HDR issues in addition to the usual Paramount problems. It is simultaneously better and worse than the Blu-ray master.

Kino Lorber Blu-ray is significantly worse with potential DNR see caps

OOP Olive Films Blu-ray seems to be the same transfer as Arrow but with Quicktime Gamma Bug see comparison

Unrestored: 35mm scans or 1990 Disney LaserDisc

Restored: 1998 Disney LaserDisc/VHS and DVD and Blu-ray versions are edited (colors altered, DNR applied, and animation errors fixed)

Even though there is a RaroVideo Blu-ray, it has aggressive DNR and bad encoding so Minerva DVD is still visibly superior, see DVDBeaver caps.

While Minerva DVD has contrast boosting and black crush, it's still much superior to UK Optimum DVD.

Crystal clear, albeit with some distortion in louder areas

The 4K Blu-ray reuses the same poor mastering used on the 2006 WB Blu-ray, only with a completely unnecessary bass cut and extra noise reduction.

Even putting resolution aside, the Warner Archive 4K Blu-ray has the best video. The old Blu-ray master and earlier DVD both had massive issues with colour.

That said, picture on the 4K Blu-ray isn't perfect, with strange posterized magenta glints and some instances of DNR: https://bsky.app/profile/dagscott.bsky.social/post/3leahavqi7k2l

The Universal HD master is appalling. This is a large format early Technirama film that has been hit with a massive amount of DNR resulting in a smeary appearance throughout with little detail. On one hand it is still a better scan than the old DVD with better color and element issues addressed. On the other it is barely above the DVD upscaled in other moments. The mono audio has been horribly processed to sound thin, canned and lacking in overall fidelity. The DVD clearly uses the same source element for picture and sound and here the sound is left alone. It sounds miles better. The Kino Lorber Blu-ray is technically the best US release but this master has been released in Europe where it likely has better encoding. The Kino Lorber Blu-ray adds a basic commentary. This film needs a proper transfer and audio presentation desperately. The HD master is so lackluster that the DVD despite its age is arguably preferable in visuals and certainly far superior in audio.

BFI 4K Blu-ray has excellent master and grade, no DNR and tasteful HDR

The unrestored track on BFI's earlier release appears to be an almost entirely unmanipulated transfer of the original mix. It suffers from a distracting low-frequency hum. The 4K restoration comes with a restored track, which appears to be the same transfer, but which appears to be cleaned up with a moderate amount of noise reduction and some EQ, nicely opening up the high-end, and which is likely to be preferable to most listeners. All earlier releases sound poor.

Perspecta isn't a discrete surround format, instead only relying on manipulating volume and panning of the mono track across L/C/R channels, based on embedded control tones. As such, even the Perspecta track is technically just the mono mix, though the omission of the proper mono on BFI's 4K is still unfortunate.

But terrible DNR from master for all releases

Intact grain compared to Toho/BFI UHDs' DNR'd master

Criterion 4K Blu-ray is good, derived from the 1995 Criterion LaserDisc (which would be minimally better due to its lack of filtering) see blah-ray

The UK disc has supposedly had some revisionist changes done along with DNR. The disc is OOP. Tentative alternative is Criterion DVD

France Carlotta > Criterion 4K Blu-ray see caps: https://slow.pics/c/s7AfL3XW

Grain is sharper/clearer on the new Carlotta/Criterion 4K; BFI's grain resolves slightly worse and more so in motion, being a standard Blu-ray; The Toho 4K's grain is softer, probably DNR'd.

BFI Player used to have the same mastering available to stream in 2019.