Should we transfer the score from https://www.sakugabooru.com/post/show/53478 to this post?

No, score transfer happens through replacements. The DB movies are a bizarre awkward beast that currently get two uploads for the few movies with no high quality uncropped sources. I'm still kind of on the fence about that, but if it stops people whining that their cropped Blu-ray post got replaced by a mid-looking DVD then I'm okay for now.