While I don't own either, some basic information about these balls might help you with your decision:
The DC has a significantly lower RG than the EPP; so it will rev-up a lot quicker. The DC also has a slightly higher load of particles (3% vs 2%, I believe) ; so, with the same cover/surface finish, it will handle higher amounts of oil than the EPP.
The DC also has a higher RG Differential, which is probably what makes it hook more at the backend; it is also more continuous, once it starts hooking.
If you drilled the DC slightly stronger than the EPP, you should easily see that it is a stronger ball overall and meant to be almost a complpete step up from the EPP. Of course, this also means you have to use each ball on its proper oil pattern for the amount of hand you have and your ball speed.
Good luck.
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"We get old too fast, and too late, smart."