Nope, no difference in the Rosewood. My 1982 XL bezel has a black backing, but my 1980 Ranger Lariat bezel has a brown backing. As 81 Explorer said, just a different way of making them.

The bezel on the left in the following pic is circa 1982. The one on the right is circa 1980. There's a difference here too. However, after I cleaned the 1982 bezel, I noticed it turned a shade lighter, and now is much closer to being the same color as the Ranger Lariat bezel. The difference here is that my Ranger Lariat radio bezel was well taken care of. The other bezel came from a truck that was relatively trashed. Most of the really good condition bezels i've ever seen are the same hue/brightness as my Ranger Lariat bezel.