Carsize is always a topic on the development table.
Car width is the same for all 1875 mm
Numbers I have found online are;

Brand Wheelbase Length
Toyota 2630 4225
Ford 2600 ? Do anyone know?
Hyundai 2630 4100


So cars are pretty similar, I am guessing due to the common spaceframe.
Difference of 120 mm btw Toyota and Hyundai in length with same wheelbase, is overhang front and rear. Might play a small part on gravel in tight corners.
Or are the cars too similar in the measurements that it will play a role on the different surfaces?