Sarah's involvement is on a different order than that of say Kristy, Jael, or any of the others who have worked with Delerium/Conjour One in that she really does take over the song, it is the focal point of the work, where as in most of the other delerium works the vocal is one of many instruments playing. Sarah has a level of power and projection in the (especially) upper registers that most of the other vocalists that have been part of this project can't match.