Trying to decide which route to go with Ceramic coating. The installer I spoke to offers both CQuartz and Gyeon. The price of Cquartz Pro and Gyeon Duraflex is exactly the same. Cquartz Finest is $500 more. The installer recommended Gyeon Duraflex for a black Model S. I can't find a lot of information about Gyeon and can't find anything that discusses how it compares to Cquartz. Is anyone familiar with both that could offer some information?