I think the physics are different, a ball is basically a car without a differential, so it's going to behave differently on the tracks. I'd imagine the ball is harder to simulate because of that.
https://www.youtube.com/watch?v=8YeXyUNCnhM
I'd imagine that the 3d-printable models could be imported into blender, so it's 'just' adding balls and motion to the lift.
https://ansyshelp.ansys.com/public/account/secured?returnurl...
But for hobby purposes I would suggest to contact some university, they have such software, and they could find simulation of balls motion at marble fountain interesting for research (and educational) purposes.