Of the current coating options, the bronze, forest green, and midnight blue are all metallic-looking, and all three have a black "undercoat". The top colored layer isn't horribly thick.
The black, desert sage, and muddy brown coatings are similar to each other in texture and thickness, and are uniformly colored all the way through. They're also the oldest options left, from some of the earliest days of colored options, after the smooth, black, "ceramic" coatings.
Hammered silver is unique in the current lineup (similar to moss green of old); it's got a slick feel and a glossy look, and is the thickest coating of the current coatings. Looks like almost plastic was "boiled" and then all the little bubbles hardened instantly.
HTH.