I'm a LINE-X dealer.
LINE-X and Rhino differ quite a bit. The biggest difference is that LINE-X contains polyurea and Rhino does not. Polyurea enhances the bedliner’s properties: 1. LINE-X's temperature tolerance is 250 degrees and Rhino's is 175. As the temperature of the bed approaches the temp tolerance, it loses its strength. 2. Polyurea keeps moisture out of the solution thus making a more dense and solid liner. Less moisture also means better adhesion. 3. Polyurea also makes for a tougher liner. The tear strength of LINE-X is 304 pounds per linear inch (pli). Rhino is 145 pli. 4. Polyurea sets up very fast, that's one reason why LINE-X goes on with heat and high pressure. LINE-X dries in about 4 seconds, so you get an even application throughout the bed. Rhino takes a minute or so to even gel, an hour or so to dry. Before it gels, gravity can pull the liner from the top ridges in to the low valleys. Rhino’s Tuff Stuff goes on cold/low pressure and thus has that “cottage cheese” or “rain on the windshield” look. LINE-X’s high heat/high pressure system gives it a very nice finished and more consistently applied texture, it’s sort of like an orange peel. The dealer can vary the texture from smooth to very rough. 5. Polyurea makes the liner more chemical resistant, especially to organic oils and solvents.
LINE-X offers a written nationwide lifetime warranty. Rhino’s warranty is only with the dealer that sprayed it.
Speedliner (and Superliner) are brushable polyurea paints. You mix on gallon of resin with one quart of catalyst and paint it on with a roller or hopper gun.
Fading: They all fade (even Speedliner, I have pics), some are worse than others. If you already have LINE-X, apply some Just Once (
www.justonce.com) on the liner to restore the color and to keep it from fading. LINE-X has a brand new product called Xtra, made by Dupont just for LINE-X bedliners. It's applied like a topcoat but migrates into the liner. It's black, glossy, won't fade, and contains Dupont Kevlar Pulp.
Long post... ... ..... Let me know if you have any questions.