dp2Q has a new better screen.
SIGMA is now displaying dp2Q in Japan. Someone at the event mentioned that dp2Q has a better screen compared to the prototype which was displayed at CP+. He also posted the picture of how it looks. He tweeted that it's not as good as current Sony's screen, but it is as good as Olympus's screen from a couple years ago.
Now SPP6 has a menu bar on both sides.