I’ve installed many D10A’s and D100’s. The D10A is much more feature-rich than the G5, having OAT for density altitude, true Airspeed and wind direction and speed, none of which the G5 does. It’s screen is also a little bit bigger. Those are the Pros. The Cons, compared to the G5 is the size behind the panel, which makes installation more difficult, and the screen that is not as bright or as sharp as the G5.
I have a D10A and a G5 HSI in my 1956 182 and love the combination. True Airspeed is something that we really only guessed at in most airplanes until now.