XIV Installation Inquiry

At the moment I have the phase 4 client installed. The client is 'locked' at the moment asking me for a Registration Code because I still don't have my pre-ordered copy. When I do get my copy in the mail and put in my registration code should I uninstall the phase 4 client and install the game from the DVD, or is there no difference?

Phase 4 client will work for the full game once you get your code registered

Phase 4 client is actually the final retail product. Just log in and it will update after making you agree with the terms of use or whatever else they want you to agree with.