Well I called Pioneer and they said that the discs were map only. I asked them about the different groups splitting up the D3/N4 with the rest of the systems, and she said that was because the other group are discontinued systems.
They wanted to say, here is the map update that is available for these current products, but if you have one of the older models, you can update your map as well.
I still want to see the update with my own eyes to judge if they added anything in features, but we shall see