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Anyway, have you considered running both on the same page to increase revenue?
At present the market iam in is 'online party invitations' and is busy during festival/holiday seasons.
I am adding one more website which will be news service and is expected to drive heavy traffic.
I will post my experience with adsens again after few months and see, if it helps.
At present i fell that the space iam allocating for adsense is not worth the money iam getting.
As for me, I dislike Kontera's approach to serving ads and will never use them. I don't find them relevant or contextual at all, merely jarring. But if they work for you then stick with them and drop AdSense.