I have a pair of native Hexx's and my dad has the RP Freeon.
I like my glasses because of the polarization and I have already used the lifetime warranty to replace the lenses. Native has pretty good service, replaced my glasses with no q's asked but it did take them 2 weeks to ship them to me.
The freeon's look better and fit my head better, but were way to expensive for me to buy. The frame seems durable and the lenses are pretty high quality. I also liked the adjustable nose pieces taht my natives don't have.
All in all, The RP freeon fit my lumpy head better but I liked the polarized lenses on the natives.