I do race, yes, but that is not in question here.

If I did build different cars with different setups, no, they would not be identical, but even if I was into racing and just liked having a couple of the same cars, what are the chances that they would end up being "identical"?

The OP was talking about buying another of the same car, people do that all the time, but I have never seen it done where the next car is "identical" and since it isn't, why does it bother you that it is the same car and they didn't move on to something new?