Why would Red have a loudness of two? Theoretically, it wouldn't have any sound. The sound you hear from it is from caps and bottoming out. If you don't bottom out, you barely hear anything. The same for Blacks. Browns/Clears would have a bit louder noise because you can hear the tactile bump, at least as far as I remember. Of course, if we're basing loudness on clicky switches, Blues/Greens win to prize.
Gaming and Typing would be subjective IMO. Many people think Blues are just fine for gaming. Though, again, I understand you're marketing mostly to gamers.
That looks like it would be a good set of data points. There really isn't anything more I can think of.