I think that, as Willow said, if the rehairing and styling was amazing, then that would make up a lot for the non-sculpting/sewing. As for extras here and there, instead of sculpting, they could be done in several different ways, such as being painted on (i.e. tiara painted, then glue a little gem on it type thing), or some people are really good at metal work, etc.
But if it's a symbol paint and rehair, I don't know, really. Some people are amazing at painting and will make the symbol something breathtaking - others will make a very simple symbol, which I don't think is particularly "fair" so to speak for others who are putting much more time into it.
I think at the end of it all, what's most important is the time spent on the custom. A rehair and a simple symbol paint won't take nearly as long as a sculpt/sew, paint and rehair, but a rehair and a really intricate symbol just might.
Hhmm... I don't think that helped
