Genesis 2 Female and Genesis 3 Female have very different topology.  With G3F DAZ has abandoned their old ideal of the topology most follow muscle structure as much as possible for a simpler and cleaner edge flow.  interestingly this was seen as major flaw of the many new Vicky replacement figures.  I had my doubts about it too but the body builder morph that is included the free base package show that it can and does work.