The difference is really not worth worrying about, from a technical perspective. Unfortunately the terminology is mis-used and, even as a chemist working in this area, I am often unconvinced that a product actually is what it claims to be. From a non-specialist perspective, the only thing that should concern you is the performance - marketing claims based on fancy terminology should be taken with a pinch of salt since it is an unfortunate fact that the marketeers often have no idea what they are talking about.
For longevity, I think the optimum coating is yet to be beaten on your market.
