The base models gets the hardware, and some safety functions that use the hardware (like AEB, FCW, Side Monitoring, maybe some more).
The software add ons are for convenience things like EAP, and FSD.
There isn't a such thing as AP1 on a HW2 car. That was only a transitional thing, and we still haven't seen exactly what those people will end up with.
If you're taking advice I would advise going for EAP, and skipped FSD for now. I really wish they offered TACC without EAP, but they don't. With an HW1/AP1 car TACC is really the only thing in the AP1 software package that I regularly use. Everything else is premature and before it's ready. Maybe the story will be different with AP2, but that remains to be seen.