BFI Blu-ray

BFI Blu-ray is the only one with English subtitles, while France Potemkine and Japan IVC don't.

BFI is a 4K scan and BR review is the only one I can find and it has good ratings.

There are no comparison or other caps available.

BFI Blu-ray is original mono, the other releases are unknown

France Gaumont Blu-ray

Gaumont France is 4k transfer, not sure about Japan