Soundwise the 8002 does seem to get the edge in my opinion and it has less crackles and pops. Yes the platter is different, so are some of the electronic's, the taco. Both had the remote control option and are weighty. There is probably more. Is the cartridge that different betwwen the MM20CL and the MMC2?
A lot of the 8000's were trashed until recently when Martin solved the tacho disk problem not sure if they have other issues..
I think it was a reasonable update for the time that suited engineering and marketing. Pity they forgot about the clasp on the lid.
Beoaus.