If we go on what we hear and not what we see(I've seen many cars get killed by bikes on back roads)
This video Which is a gally vs a ducati 999 shows the ducati winning by just a little. Throw in the mix that the 999 can't compete in the same class as the jap liter bikes because the liters are faster and it has to be dumped down into a 750ish class. I've seen a gsxr750 and gsxr1000 take a road rated at 25mph in a car at upwards of 100mph. Its all tight turns and switch backs.