Rhino is a 100% polyurethane, LINE-X is a blend of polyurethane and polyurea. Both polyurethane and polyurea give the bedliner desirable properties. For example, polyurethane has 2 to 3 times the abrasion resistance of polyurea and provides superior adhesion. Polyurea, gives the
liner a higher temperature tolerance and tear strength. For example, the tear strength of Rhino is 145 pli, LINE-X is 304 pli. It's my opinion that the best liners contain a mix of both polyurethane and polyurea.
LINE-X offers a written nationwide lifetime warranty. Rhino’s warranty is only with the dealer that sprayed it.
There are other significant differences between LINE-X and Rhino, let me know if you interested in learning more.