AIW 9700 pro overclocking abilities

I'm new to overclocking and i have a question. I'm building a new system and will probably use a radeon 9700 pro card, but i am also interested in getting the All in Wonder 9700 pro. I plan on using all of the all in wonder's features but i don't want to buy it if it doesn't overclock as well as the normal 9700 pro. Does one overclock better than the other or does it not matter??

Thanks for the help!!!