WP,
   I am sure you will get better comparisons, but I'll get the topic started:

I haven't thrown the Secret Agent, but the Resurgence is a stronger ball the my Special Agent. If you are looking for a ball for heavier oil, I think the Resurgence is a very good bet. It has shown itself to very versatile as well. If you remember Wes Malott threw one for the first game on TV on the Cheetah pattern a few weeks ago, his was shined but I did not see or hear the drilling. So you can tweak the cover and the drilling to get the control you are looking for. But in the OOB with a strong drilling ( as I have mine) it makes a very controlled move in heavy oil, not jumpy by any means, just a smooth arc through the oil and through the pins.

Hope this helps.
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Jorge300