at the time that i did the original subjective analysis, i also tested a genesis 3, and it was very close to a genesis 2, iirc. i will have to get one somehow and add its results to the page eventually.
as for the gb stuff, i did a subjective test of those when i was doing the mm gb recordings, and the game boy player won. i guess i could do a page for those, as well, but imo it's not as big of a deal (the difference in quality is not as humongous as with the genesises).