Genesis 3's UVs are set up to be more compatible with Zbrush, so they are laid out next to each other horizontally, something you will see if you pull her into a non-Zbrush modeler. It's not just a matter of material names, although that is a fact (there are fewer materials). Genesis 3's UVs and mat setup are fundamentally incompatible with all previous generations. This difference in bones means poses don't convert without a product like Zev0's new one. She has working toes, two neck bones, etc. She also has separate twist and bend bones, partly because she is a return to general weight mapping (away from TriAx).
She has a full facial rig - expressions are made by moving the tiny bones in her face, just as they are in Pixar's rigs and other important animation. Genesis 3 has a lot more bones than Genesis 2. I won't be telling you anything that violates my non-disclosure agreement with DAZ all of this is stuff you can figure out by looking at the figure for a while in DAZ Studio and a modeling program (or by paying attention to store releases). Here is some plain talk about the new figure.
I barely dared glance at the forum today, but I assume there's probably a lot of text-yelling going on.