AB is lighter than WW by a bit, besides being a different type of color and sheen. I'd say you're in the skin tone range where it'd be a blush, not a contour, and it might not show up that well and just blend in with your skin. Try Before Buy is my usual mantra. On me, NC15, WW looked better on me when all my yellowish summer tan was totally gone (I almost missed out on it because at first I didn't like how it looked on me), while AB looked good right off the bat.
Did you get it after all? It seems like there will be tons of similar shades this year - just like there were so many different colors that were close to Early Morning in 2012. I think it's a must buy only if #1: you loooooooooove MBs and #2: it looks great on without a lot of hassle; but I'm one that has an easy time resisting natural and nude colored blushes, if they don't grab my heart. Hell, I almost passed on WW and totally skipped Earthshine (
, I know). I'm going to wear the heck out of AB, but it was an easy choice on my skin.
They're rated waterline safe, which amazed me. I wore the navy one all day, including during a workout and it stayed in my waterline and didn't sting or irritate at all. Some of the colors look shimmery when swatched, but once applied, the shimmer is not obvious.
Some are softer than others, but they've got a kind of waxy feeling too. The black, brown and teal are the creamiest, the navy's in the middle, and the purple is much waxier and stiffer. The Glamourdaze kohls are stiffer by a bit, but not waxy.