Snapshot (1979)

4K is defective with color space issues and poor encoding, disc replacement program for the 4K disc has been setup to correct the color space issue. The UHD has visible artifacts from the bad encoding. The HDR is overdone and the Paramount 4K master has grain management.
The new Kino Blu-ray has none of the UHD's problems and is superior to the UHD in every way though it still uses the same Paramount master.

DVD 5.1 or LaserDisc 5.1 AC3, LD PCM 2.0 for the matrix stereo version. The LD and DVD seem to be the theatrical audio mix untouched with plenty of low end. This low end like a number of 90's Paramount titles was mixed out or tamed on subsequent releases. 

The Lionsgate BD and Paramount BD share the same lackluster HD master with DNR and image distortion. The Lionsgate is much better encoded but has a 7.1 remix which messed up the original mix design by lessening all the great Foley work in favor of the score. The Paramount BD had a 5.1 lossless version of the original mix but it's a new version where the bass has been tamed so the track has lost its punch. The Kino Lorber UHD and Blu-ray recycle this same lesser 5.1 mastering. The original mix can still be heard on LD and DVD. The 2.0 stereo on the Kino is matrixed but also does not sound as good as the 2.0 matrix audio on DVD or LD.
Kino has announced a replacement program for the defective UHD but it is highly likely all the other problems will go unaddressed. The Billy Zane interview on the Kino BD has technical issues in the editing and clip quality used.