So in my case there are two identical versions of the same album, with different names?
In my situation there is:
１９８８ エスケープ・モール: https://sunsetgrid.bandcamp.com/album/--17
The first is already listed on MusicBrainz under this release group. But the latter does not exist. Both have exactly the same songs. The only difference is the first is released under a label, a different cover art and of course the title.
Would this be a situation where split naming is used? E.g. 1988 / １９８８ エスケープ・モール? Or would a new release group be created?