Albert Rémy

Criterion 4K Blu-ray > 2021 Carlotta France 4K Blu-ray. Carlotta has bad compression and elevated gamma levels, while Criterion shows more shadow details. See caps1 and caps2

Criterion actually handed the flawed MK2 master over to Prasad Corporation for "additional restoration" instead of working on it in-house.

Criterion 4K Blu-ray is another SDR grade inside an HDR container, with average brightness on HDR BL of 83 nits and 100-nit static DV. See fkid post

(both from the same flawed restoration)

The BFI and Gaumont Blu-ray releases are both from the same restoration by Éclair. Although this restoration is much superior in detail to the old Criterion DVD, like many Éclair restorations, it has issues with colour. There is a definite yellow cast to the footage, making skin tones appear sickly and dampening the impact of the colour. The image is also murkier than the Criterion. 

As Renoir scholar Tag Gallagher notes: "I talked a lot toward the end about the light blue walls (Criterion); but when I got the BFI blu I was greatly deflated, because the walls are light gray!"

That said, as visible in the screen caps at DVD Beaver, the Criterion has compromised colour too, and often looks too blue/magenta. There is a regraded edition of the BFI Blu-ray out there on the high seas.

The audio on the Blu-ray releases is slightly compressed, but better than earlier DVD releases and relatively full frequency.

The BFI is most likely the best English-friendly release as it includes English subtitles for the bonus features.

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