M0001W is the original 1984 512K Mac with 64K ROMs and 400K Single Sided drive
M0001E is the updated 1986 512K with 128K ROMs and 800K Double Sided drive
FDHD (Floppy Disk High Desnsity) is what Apple originally called the SuperDrive. It is the same thing.
When you say you have an SE "SuperDrive" does it actually say that on the case? I assume the FDHD is also an SE, which is typically how I've seen the SE FDHD branded since 1989.
If your "SuperDrive" SE contains a SuperDrive but is only labeled "SE" on the front, then likely it began life as an 800K Double Sided drive SE and has since had its ROMs and IWM chips upgraded with the SWIM package (the chips that make floppy disk storage possible). The only way to tell for sure is to open up the case and look at the logic boards.
M0001E is the updated 1986 512K with 128K ROMs and 800K Double Sided drive
FDHD (Floppy Disk High Desnsity) is what Apple originally called the SuperDrive. It is the same thing.
When you say you have an SE "SuperDrive" does it actually say that on the case? I assume the FDHD is also an SE, which is typically how I've seen the SE FDHD branded since 1989.
If your "SuperDrive" SE contains a SuperDrive but is only labeled "SE" on the front, then likely it began life as an 800K Double Sided drive SE and has since had its ROMs and IWM chips upgraded with the SWIM package (the chips that make floppy disk storage possible). The only way to tell for sure is to open up the case and look at the logic boards.