it's been my experience that for her body type .. hard core converts better.
had she been a little heavier (more curves) with larger tits, she could of gone the soft core route. But as mention ealier in this thread her body type and jaw line tends to give her a raunchy feel ... so I'd say go the hard core route ...
here's an example of a hawt teen that has the looks, but works better HC.
www.cherrypetite.com