The Lucid representative called me today to confirm my reservation and to answer any questions. I asked whether DD Pro currently had any features that were not available with DD Premium. Admittedly not a fair question since the Gravity is not available yet. He said no, but hopefully by launch it would. He said the DD Pro Hardware was there for future proofing for when federal regulations allow full hands free driving. Both Cadillac and Tesla have hands free currently, not sure what federal regulation they would be waiting for.
He was also unaware that I was a current AGT owner. I was very surprised that he didn't have that info since I made my reservation through the same account that I bought my AGT with.