The Kavorka,
Not all -100 and -200 series have 'steam driven' instrumentation and not all -300s have EFIS. Depends on what the operator ordered from the good folks at DeHavilland/Bombardier. I'm led to believe the electro-mechanical gear is actually an option.
From a pilot's perspective, I've only flown the DHC8 and it's a great aeroplane, though the climb/cruise performance of the -100s is a little lackluster (good takeoff and landing performance though!)
From a passengers point of view, flown in both frequently, and got to say, the Dash wins hands down, especially the 'Q' models with the Noise & Vibration Suppression system (NVS). Roomier, quieter and more comfortable cabin.
Haven't had the pleasure of riding on the new(er) B+ models, but would be interesting to see how they compare to the A-
