Are the scene files the same for both cameras? I have a one I really like for the 200 but if I use or buy a 200A, and I use the same settings, will it look the same?
The chipsets are different between the 200 and 200A. The 200A has a lot cleaner noise, better/more accurate color reproduction, and is a half stop more sensitive.
Setting the settings the same between them is a place to start (and manual white balance is mandatory!) but you're still going to have to adjust them. The way to do it is to point them at the same scene and plug them both into one monitor that has two inputs, and then switch back and forth repeatedly, adjusting one of the cameras until you get them well matching.