You will need to create both a new PSN and new FFXIV account (make sure to create an entirely new Square Enix account as well, not just FFXIV) to play the free trial. Also note that this applies to any existing FFXIV account you had as well, since it is linked to your PSN. To circumvent this, you can make a separate PSN account to register the free trial to.
Given all the confusion about account creation for FFXIV (I know, it sucks) in light of the new patch and free trial extension, I figured there was a need for a specific thread people can defer to.
