She's supposedly got more-better rigging... "Twice as many points of articulation than before", whatever that means. Two elbow joints? I don't think so... A couple more joints in the shoulders, hip/thigh and trunk would be nice, though.

But, "DS Only" is a killer.

The fact that G2F has the pelvis and a few more sections in the belly has been helpful - so how often do you have a perfect pose ... except you wish she were tipped a bit more forward or back from the hips? With V4 you had to rotate the hips, which moved the legs & feet.With G2F, her pelvis allows the hip rotate without affecting feet.
(I am learning to use her in Poser - so far is great for output, but DSOn seems to cache a bit too much & if you get out of sync, old stuff stops working).

I agree about the DS-only road-block. Since i started using G2F in Poser, I'm sure I've spent a few hundred at DAZ (after 3 years of zero purchases), but I'm not going to abandon Poser for the privilege of obsoleting all my old content & starting over with a credit card! :)

I have PP2014, an octo-core AMD, 16GB RAM, Win8.1 (soon to be 10) and about 4TB of hardware with another 4TB backup.