Richard Portnow

Universal UK > Kino US

1999 Disney DVD has the original 70mm 6-track mix in 4.1 (mislabelled as 5.1 in the US release)

Plaion German 4K Blu-ray > 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.

Arrow UK & Criterion US 4K Blu-ray have different gradings (preference, Arrow 4K Blu-ray is encoded by Fidelity in Motion)

• 4K caveat: A variety of VFX set pieces and touch-ups were added in scenes throughout the film, probably for continuity or consistency, although they might be unnecessary or revisionist. Clouds are added to clear sky of the last act.

• AI is used to fix an unwanted camera movement in one scene.

• some shots had been further stabilized, resulting in strange motion blur.

Also has missing dialog intact.
But it can be argued that the Warner Bros 4K Blu-ray 5.1 (remix) is technically a better mix.

More info on the different color grades over the years: https://notonbluray.com/blog/the-case-of-se7en/