I’ve noticed some differences:
MAXELL 002’s packaging has no thread.
MAXELL 003’s packaging has a thread.
MAXELL 002’s jewel case has a small middle thingy holding the front paper.
MAXELL 003 only has two thingies, like most jewel cases nowadays.
MAXELL 002’s hub codes aren’t straight, but following the ring, like 0674BB205F2004760.
MAXELL 003’s hub codes are straight and like P4CA165B.
Also, MAXELL 003’s jewel cases have a flat star in the middle, while MXL RG04’s jewel cases have a star with a hole in the middle.
Could it be that those discs (which are all MIJ, btw) were made in different factories or stuff like that?