HH,
B300 different electrical system
An A330/340 sim can be reconfigured by changing the throttle quadrant, surely a B200/350 sim can be reconfigured by changing the lower/overhead panels. Then all that is required is a change to the flight model.
I understand there are sims available that can be interchanged between Kingair types, unfortunately the one we have available in Australia is not one of those.