OK, now I understand. For 2005 ( and one was at the Seattle Boat show,) C-Dory made a number of detailed structural changes.
First, they put in a removable cockpit floor, so they could access the fuel tank without cutting out the floor. I'm not certain what that means, but they were proud of it. Second, they enclosed the outboard transome well. Steve on Dora-Jean (2004) has the open well, and at first glance it looks the same fore and aft length to me. I like the enclosure. To complete the enclosure, cockpit drains were installed in the new aft bulkhead and they exit through a hose. Also, two shelves were installed in the enclosed space, one on each side. These where 2 batteries were installed, and they're big enough to hold a pair of golph cart batteries on each shelf/tray.
The other changes were equipment installation changes, and they were after the 2005 model.
They're all good, just different.
Boris