Before you worry about the advantages of having the same games figure out if 1) they are fun for you and not the internet commandos 2) if fixing them is fun because if you don't like to fix, owning the same generation doesn't matter at all. I know many people who have boards to swap but IMHO that is dumb (and I have lots of boards that I have never used)

I have lots of system 6 and 7 stuff right now but don't have any of those pins. I love them and will in the future but my collection went away from that right now.