Second Sight 4K Blu-ray

Second Sight 4K Blu-ray > Le Chat Qui Fume 4K Blu-ray > Umbrella 4K Blu-ray see caps

Second Sight uses the same Le Chat Qui Fume master, but encoded by FiM and applied Dolby Vision. Umbrella's encoding is visibly worse than Le Chat Qui Fume.

Mondo Vision Blu-ray and Anchor Bay DVD have an alternate audio track with an unauthorized soundtrack.

Paramount 4K Blu-ray

Paramount 4K Blu-ray (4K Ultra HD Blu-ray release is a significant upgrade from the 2006 Blu-Ray and features Dolby Vision and HDR10)

Paramount 4K Blu-ray (4K Ultra HD Blu-ray release features a 5.1 channel DTS-HD Master Audio; 2006 Blu-Ray featured a lossy DD track)

Paramount 4K HD Blu-Ray's video and audio are significant upgrades from the previous 2006 Blu-Ray. ViaVision's 4K UHD Blu-Ray features the same 4K video scan, but has 2 audio commentary tracks included on the 4K disc; Paramount's 4K does not (the commentary tracks are available only on the included Blu-Ray). 

Shout! Factory 4K Blu-ray

Shout! Factory 4K Blu-ray

Shout! Factory 4K Blu-ray / Warner Bros Blu-ray (no audible difference)