Even that I am a Poser user I would say your friend might be better of with Daz to start off. just to be able to get the Freebies offered by 3rd Party creators in Poser and Pay the Price it is not worth it . The good old stuff is still based on V4 M4 and she would have to get her at Daz !

There are loads of great free content for Poser and DS over the Internet just use google search for "Free Poser/ DS" . Ds will support both DS/Poser models , at least almost all with the little exception of La Femme. Also at the moment she would be in disadvantage as no one knows how it will develop and making large Investments into Poser could end up as a loss. Poser has a call home system that might be changing into a monthly pay system , they just have to hit that little button !! so better wait up until they release Poser 12 as it also could be that they hit the button and shut down Poser 11, you never know.

The next thing is that most of the great Creators make models for DS , so if she plans to buy stuff she might get better quality for the price offered. The latest DS models are very developed and it would take poser over a decade to catch up on them if they get some capable Creators, what I doubt, as they rather get rid of them then to recruiter.

This is my honest meaning even that I am a Poser user and should support it , but if I were to start off from scratch I would Pick DS to be on the secure side.