Holy Texture density batman! Seems to be the tool used on Avatar, estimates of a price ca. €500 (sweet) http://www.thefoundry.co.uk/pkg_overview.aspx?ui=3366FFA1-E59B-4772-9BB3-94F496491576 http://www.fxguide.com/article604.html that there is everything i use photoshop for.
In regard to functionality, id dont think there will be much between the 2 applications but isn't Bodypaint $1000? If this is really going to be 500 then that is some really stiff competition right there, which is great for consumers. :) Though you can have 32k maps, it doesn't mean you have to use them...it would work…