My point is that as an end user, there is basically no difference between autopilot and FSD if the FSD beta is enabled on the car. It's a technical detail that doesn't seem significant.
If the end user said they were driving on FSD, it likely means they are enrolled in the FSD beta and were using autopilot - in the car there is no distinction between autopilot and FSD. They are the same thing in the car if the FSD beta is enabled.