As a manufacturer is really hard to be different. Guys that buy your car see stuff on other cars and want you to incorporate good ideas into your future designs. Any new cars that come out have to have vertical ball camber adjustment, bearing caps for diff removal, eccentric diff height/belt tension adjusters, etc.
I give Losi huge props for swimming against the current with the JRXS but they paid the price for it. They got it working great now but they lost a lot of loyal customer because it didn't "look right".
Sedans are getting to the point 2WD buggies have been at for years. They are very similar looking because thats what works.