This stuff is so complicated and insane, that a 720p TV version from a decade ago can look better than a modern 4K Blu-ray release.

Case in point: Ghost in the Shell (1995)

http://comp.judging.it/index.php?seriesid=Koukaku%20Kidoutai...

Old TV version: http://comp.judging.it/content/Koukaku%20Kidoutai/4K-1/Judgm...

New 4K BD: http://comp.judging.it/content/Koukaku%20Kidoutai/4K-1/4K%20...