Exactly. The main reason to have a software arranger over a hardware one is to be able to easily play a wide variety of different manufacturers styles.

If vArranger could play Ketron, Korg and Yamaha styles into a BK-7m (or any other sound source) and map them well enough so that they played decently, it would be a no-brainer!

Not much point using vArranger to play Roland styles into a Roland arranger module, is there? LOL