"hard" anodize is typically thicker, but you can specify the thickness of the layer with the process time. Cosmetic color anodize is usually ~10um. Hard coats can be up to 100um.
Who would have though my fist post would be technical? I'm an engineer, so I spec coatings sometimes but its not my primary job. If someone in the metal finishing business has a better response, then by all means take it.
-rpl