VC Andrews introduced me to sexually charged stories when I was in my early teens. However I can't read her stuff anymore since it ALL has the same plot. Damn ghostwriter can't come up with a better plotline so s/he just keeps writing the same book over and over and over etc. However, the books Andrews actually wrote are very good.
Rice on the other hand actually writes erotica. The first book in the beauty trilogy was my first real intro to erotica with a plotline (as opposed to the books of penthouse letters which I find funny more often than I find them a turn-on). But even if we leave the erotica to the side and pit Rices fiction against Andrew's fiction theres still a much more explicit and sexually charged theme in Rices work. Also, Rice at least gives us a new plot line (usually) with each series.
I like how sometimes its just about the passion...i.e. just erotica...and how sometimes its philosophy and logic...or more like, ripping apart every thing you know about love and sex and creating vast new horizons.
Anne Rice.... I've only read the Beauty books... but VC Andrews makes my stomach turn in much the same way John Saul does...
But for someone who doesn't really write erotica, Stephen King often turns with up a real hot scene in the midst of a novel...