According to the booklet, Decameron and Canterbury are 2k scans done by Palazzola and colored at Colorworks.
Nights was done at a different place, has no people listed and says new HD digital transfer, not 2k scan.
Not having seen the films I can't say, just mentioning it since it seems relevant. The other release is the BFI Region 2
Also, correcting the framing would usually mean cropping only on 2 sides, not all 4