I just paid $6 for the GOG re-release of LBA 1, and turns out it's the EXACT SAME as the normal CD version. The RELENT.EXE file is exactly 258513 bytes, same file size as of the normal version. So what exactly is changed? Nothing I'd say.
But ah well, looking on the posivite side, I just have to change the .EXE file with the Japanese one, as well as TEXT.HQR etc., and I can play the Japanese edition.