AMD Athlon Buyer's Guide - Part 2: Overclocking

Business/Office Applications are where the faster L2 cache is preferred over the slower L2 cache with the faster CPU clock speed. Most business/office applications are small enough to fit within the L2 cache of the Athlon and thus a faster L2 cache is preferred to the faster CPU clock speed. At the same time, keep in mind that you don't need to have the world's fastest CPU just to run business/office applications. If you're using your computer for more than just business applications, the performance gains in other areas will make up for the loss in business apps.

These last few tests seem to offer a small tradeoff between L2 cache speed and CPU clock speed, so the deciding factor comes down to how much of a sacrifice you're willing to give up in some areas in order to gain in others.