http://na.finalfantasyxiv.com/pr/product/

* Users who pre-ordered the Windows® or PlayStation®3 version of FINAL FANTASY XIV: A Realm Reborn and received the Cait Sith doll minion and Moogle Cap bonus items will not receive additional bonuses for pre-ordering the PlayStation®4 version.
If you have already received a pre-order bonus you cannot get another one unless you want to make a new account all together.