So I guess it was Hitachi's plan to offer a "potluck" drive even though they don't advertise these as 2 different drives, which is odd as one is a 5400 PATA while the other is 7200 SATA. Weird.
On a positive note I started the day calling every Best Buy within a 100 mile radius. Ft Myers, St Pete, Brandon, Clearwater, Tampa etc. The Brandon place the guy I called picked up one that had "USB powered" written on it, and he confirmed it was "DTG" serial. He held it for me so I drove up there. Purchased it at the CS counter. Walked over to the rack and there were 5 more DTG models. I bought a second one.
I guess the hardest part was explaining to a salesperson the difference between the two, which to them they can't understand as they don't acknowledge there is even a 7200 model.