FGX has independent suspension and from experience its easier to drive, not sure why its considered "advanced" level.
The TRF103 is competition level. The thread was talking about the stock F104 which isn't nearly as good. However, the F104X1, W GP, V2 models are competition level, and for the most part can be converted from a normal F104.
And if i recall, AE is quitting onroad cars.