Thats the thing, Just emailed support about it too, She replied back saying it has the DLC and linked me this as proof. http://blog.us.playstation.com/2011/03/29/the-3rd-
Tho that article doesnt confirm or deny PSN getting the DLC. So I replied back to support to await an official word there. She didnt however know anything about the FFIV one.
Edit: Also since I bought the Dissidia Prelouge for 3$, That one DID come bundled with the Areith DLC code. (Which did transfer from my PS3 to Vita and works) So it is possible some of these have DLC bundled. Just dont want to risk buying and getting screwed in the end.
"Please contact Square Enix regarding the content which is offered as bonuses in the different formats (downloaded and UMD). The manufacturer of the game would determine what bonuses or promotions are offered on a game."
So if you all want, do what I did, contact SE support to get an answer. Cause it is unfair for PSP Go and Vita users to pay the SAME retail price.. and miss out on a key unique dlc..