I don't follow what you're saying. Why would people that did not buy FSD receive a different version (or any version*) of FSD? And even if they did, why would that matter anyway, given that they don't have FSD?
* Okay, we do need to consider the fact that in reality, FSD is running in shadow mode on cars that do not have FSD, so I would expect that all vehicles capable of running the rewritten FSD NN/software will likely get the update once it goes into wide release**
** And now we need to consider that pre-HW3 cars will not be able to run the latest FSD software. So in THAT sense, there may be a subset of vehicles that have not bought FSD that are running a subset of the code (or maybe even fork of the old (current) software. Is this what you are talking about? And if so, again, why is that significant? I guess you could say that future active safety features may work better on HW3 equipped vehicles, so there may be some "have-nots" on HW2, but you can also make the statement that whatever active safety features they have are probably going to exceed what the car had when they first bought it.