This is what I understand about CQuartz Professional:
IR lights for CQuartz Professional is recommended but not required similar to Finest (v6)
CQuartz Professional is a totally new product and is actually an upgrade above the Finest (v6) formula.
CQuartz Professional can be applied on top of Essence without the need to strip the surface with Eraser.
CQuartz Professional is "installed only" by CQuartz Professional Approved detailers.
In this thread Post #2 states (in the 3rd picture) PREP & LABOR: Pro Only
Cquartz Professional is for pros only.
The tech is based on a former finest formula but with extra high tech fluorocarbon materials that makes it more durable and hydrophobic with a higher Contact angle.
If I am incorrect with my above statements...someone in the know please correct me.