The most popular class (SCAR) at my local track(LOU'S) uses the 1/10 pan chassis with the 25.5 and Novak ESC (same as VTA), spec battery (Orion 2400 2s lipo), and spec foam tires, with a 200mm HPI 4 seater body. The class is faster than VTA and the car far easier and cheaper to setup. Very comparable to WGT cars speed wise with out the expensive battery or ESC programming. We actually run the 2 classes together in a challenge style race. With 8 minute heats and mains.
Anyone that wants to try a different class say VTA just needs a TC chassis. Wanna run WGT different motor, batt, esc.
The bodies look like real cars, not so fast to be hard to drive or break when things are hit. Easy chassis setup. Cheap tires.