exactly! belt cars run smoother and it can yield better top end speed which is okay for big tracks and can be also good for technical tracksm, just install a oneway and set the car up diffrently ofcors.
if ever you will go for a belt car just get a 2nd hand one with spares(incase you break something) next.. set the car up, lastly hit the tracks! im sure you will enjoy it.
oh by the way it is much more quieter compared to shaft cars