guys im am currently deciding between Raytech Ultra 70 and Huper Optik c70 for my car (FWS). On one side I like raytech ultra 70 high TSER on paper. On the other side I also like Huper Optik ceramic technology, which i expect the performance to be more consistent over the years, although huper TSER is lower. Anyone here who have used both brands before care to share their experience ?