The main part is just the addition of a 4th axis, quite common in CNC, and you don’t always have to use the software provided by AXYZ.
I assume it still uses Gcode in which case you can use a program like Meshcam which has 4 axis cam ability, seem to remember it was around $150.
The main thing on the Roland is its ease of setting up, I’d imagine the 4th axis is in a set position so the controller knows the centre position and I also assume it has sensors for automatic height setting. On my machines this all has to be done manually.
Steve