SpacemanDoug said:
The Mondo transfer uses the same 4K master
No it doesn’t. The Mondo uses a separate restoration created in 2006 or 2007 I believe, released as a Blu-ray in 2009.
Ultimately the Mondo is the best looking out of the available HD masters, because it retains all the existing color information, which the MGM master does not. Sadly, MGM’s 4K restoration looks a lot better besides the color issue, because the Mondo has some strange wobbling/warping, some highlights are blown out and clipped, and there’s blended frames that crop up every-so-often (there’s also missing footage but that’s a different problem).
The MGM’s color looks more green than it does brownish to me. If they would release the 4K restoration on UHD Blu-ray with HDR, I’d bet the color could be salvaged finally.