Comparativa entre ediciones: http://www.dvdbeaver.com/film6/blu-r...nt_blu-ray.htm
Arrow - Region FREE - Blu-ray (January 18'): This is a Brand new 4K restoration of the film from the original camera negative. The Apartment has been exclusively restored by Arrow Films. The original camera negative was scanned at 4K resolution at Deluxe's EFILM Facility in Burbank. The film was graded and restored at R3Store Studios, London, Thousands of instances of dirt, debris, scratches and damaged frames (see samples below) were repaired using a combination of digital restoration tools and techniques. Instances of picture instability and density fluctuation were also improved. Films tears were present at several points, caused by severe wear on the original splices. Each of thee individual tears had to be carefully repaired. Chemical staining from the original photochemical process had left faint marks on the image at numerous points throughout the film. These marks had to be manually removed frame-by-frame. Dirt, debris and damaged frames were restored using a combination of automated and manual digital processes.
So, it's far better - detail especially with the excessive darkness of the original MGM Blu-ray marring that image. Also far better, smoother, in-motion - no contrast fluctuations, damage, marks repaired... fabulous.
Audio improves as it includes the original mono via a 24-bit linear PCM as well as the option of the surround bump. The score by Adolph Deutsch (Ramrod, The Maltese Falcon, High Sierra, Across the Pacific) sounds, flat, but effective in the uncompressed mono. It's always important to have the original - and the choice for those who prefer the surround. Arrow include the option of English (SDH) subtitle and their, region FREE, Blu-ray is limited to 3,000 copies.