Yes, the lens on the Camaro is slightly tinted (kind of a light blue) and the Firebird is clear, and the background (behind the red needle) is a little darker in the Camaro than the Firebird. Probably because of the tint in the Camaro lens.
However, very few people would be able to tell the difference just looking at it.
Ed
68 Camaro
67 Firebird (a little different radio than the 68 version, but the colors are the same)