From what little I know about it, the RS-97 is sort of the middle ground between the other two. It's not an open platform, but does have custom firmware being actively worked on. In my opinion, the ergonomics of a landscape-oriented device are always better than portrait, but superficially, I've really come to like the the look and feel of the original Game Boy. I do hope they release custom firmware for the new Bittboy, as I would love to play me some Sega Master System on the go.