Ashgan
as f2p, you get full access to a mount (no packers at all), can buy a appartment (but not put/get anything from/to it), and put stuff on GH (but no withdraw).
I don't think there is difference between "always-been f2p" and old "once-subbed" player, if we except his inventory unavailable (but not lost)
I am unable to test it now but I am sure we did test this before usubscribed access was introduced. And by me you can withdraw your items from apartment and packers.
Also, there are some minor differences between pure f2p and unsubscibed f2p - as unsubscibed you can still use PR specialization in your digging for example (I tihnk you are limited in skills with level 150 - of course you had to have learned those skills before as subscribed) while pure f2p is unable to even learn skills > lvl 125.