Hi Erin,
I've found the answer to your question :
Olives have all the same healthy benefits as olive oil (Monounsaturated fat, tocopherols, polyphenols, flavonoids, sterols, anthocyanins), but also, if you get "traditionally fermented" or "cured" olives, then you get the health benefits of active cultures, similar to the health benefits of eating yogurt with active cultures (Probiotics).
Make sure you look for traditionally fermented or cured olives, usually found in the gourmet section where you spoon them into the plastic containers and pay by weight. Jarred or canned olives are processed differently and don't contain the active cultures.Source :
http://www.t-nation.com/free_online_forum/diet_performance_nutrition_supplements/olives_vs_olive_oil