The detox has a bottle opener on the highback, a transluscent baseplate that looks cooler than the regular one, and some cooler color schemes. Everything other than the bottle opener is purely cosmetic. I also believe they only release limited runs of the colors each year which are themed after some type of alcoholic beverage. They just basically add a little fun and cool factor for those who want a little more flash out of a Burton Custom.
I personally love the corona themed custom detox.