RE: 100MPH HPI RS4 3 EVO+ ????
I think they can both be equally fast, but there is a difference in roll resistance for sure.
With the shaft drive rs43 I can just tap on the car and it rolls freely, I can't do that with my belt drive cars.
Also with pebbles around the shaft drive is more reliable and IMO stronger, I can't count how many rear belts I've been through.