Interesting this comes up at the moment
Last night I saw a race at Brands Hatch between 2 Lotus Cortinas, a BMW2002 and wait for it, Hillman Imp. The camera was in the Imp and the action was brilliant
So as long as the parity can work and different brands have strengths and weaknesses in different areas we'll see racing, and passing, re-passing and not this procession that we see too much of nowadays cos that's boring