Over the years of collecting I managed to get two different Game Genie for the Genesis. I finally got around to testing them last night and I was wondering what are the differences between the two? Aside from the label, it seems the be the same exact thing. I have the 1991 gold label one and the 1992 black label one.

Also, I was trying to get these to work on the Genesis 3, but for some reason they would not work. Did the Genesis 3 lock out the usage of Game Genies? Thanks!