In short. Red Mirror goes over how to develop a routine, and covers Helder's 30 min. Magic Castle Routine. The tricks are good, but some of them don't translate well outside the routine.
Reflections covers how to develop an effect. Helder goes in depth explaining several ways in which he goes about creating an effect and breaks down his own effects to help you understand how he built them.
Both resources cover advanced technique and both use gimmicks in majority of the effects. They are great resources in magical theory, but you might be disappointed if you are just looking for some new material.
Hope that helped.