Hi Dan,
Using Brilliant Glaze as a topper does give it a pop just like over regular wax. However, it does not last long and based on the coated vehicles that I've used it on it seems to affect the longevity, but it does look great. What I have been doing for the Graphene Spray Coated vehicles is use the Graphene Detail spray. As much as I love Brilliant Glaze, I believe that going over a Graphene Spray Coated vehicle with Graphene Detail Spray gives a better look and it does not diminish the longevity from what I have observed so far.
The one thing that Brilliant Glaze can do that I have not accomplished yet with regular CS3 or Graphene Detail Spray is that BG will hide minor marring and defects. I tested a BG + Graphene Detail Spray on some marring on a fender and the results where fantastic.
I suspect the Graphene CS3 to be in the same category, but I do not have enough time using it to provide an opinion one way or the other. Both the Graphene Detail Spray and Graphene CS3 leave impressive results.