I'm actually surprised that Poser users didn't take up Dawn more quickly for those who are bringing Genesis into Poser especially. Dawn has a poser version and less hassle using her. My biggest issue in Poser is using clothing with morph which has gotten easier but still needs work and the dynamics which I find much easier in DS.

Here are some comparisons I did a couple of years back. Both wearing same items one is Dawn and the other is Genesis3F

Both characters use the Genesis platform and to my mind both work well. They each have their little quirks. The main reason most people go for Genesis is availability of accessories to use in my opinion.