frankleeceo - 6:06 pm on Oct 17, 2013 (gmt 0)
Both will generate very little money for you. Your best bet is to test each over 1 month period to see which fares better on your particular site. Better yet, put both on your site and compare which ones do better.
I would place 1 unit from each agency and compare at the same time.
Your best bet to increase your earning power is by working on the site more at this stage.
I like adsense over chitika however.