Following this thread, it has become clear to me that the installer may be more important than the product when considering Rhino-liner vs. Linex. In the southeastern MA/Capecod market, Rhino-liner applied by CapecodRhino-liner was thicker and appeared the better product hands down. The Linex product was thinner, less textured and appeared to weather far less well than the Rhino-liner. Yet this thread lists so many opinions favorable to Linex, I can only conclude that the installers outside my area do a better job, or the product was improved.
I have no cap, my bed lives outside, no garage, and 5 years later looks almost new.
If you can, look at some of the finished beds in your area, then choose. I looked at both, and am glad I went with Rhino-liner.