Yes, the only new items included are the Wind-up Moogle minion and the Fat Chocobo mount, both of which those who already own the PS3/PC Collector's Editions (and the 1.0 Collector's Edition too for that matter), have those items automatically added to their accounts.

In fact, this seems like it's already been done - I checked my account in the Mogstation yesterday and it now lists the Moogle Minion and Fat Chocobo mount in the list of 'other options' on the account, so if you already have the existing Collector's Edition, don't worry - you don't have to do anything more.