I admit I didn’t do any research before I asked my original question, but per Wikipedia, DD1/2 is the Honda Brio, a subcompact smaller than the Fit sold in SE Asia. DE1/2/3 is the ILX. I think this is just further confirmation that despite Acura marketing, the new Integra is just a new ILX...
2017 Civic Sport Touring Hatch (daily driver, planning to trade in for Integra Type S)
2013 Scion FR-S (weekend car/OEM+ build)
2003 Acura RSX Type S (project car)