For anyone looking here, this is just a guide I thought up and I think this is pretty useful.
If you are deciding between 2 or more CPUs, use this equation:

A= Number of cores
B= Clock speed of each core
C= The cache of the CPU in MB, also make it as, for example, 6MB cache, that would be 0.6.
D= Your answer, or "CPU Rating".

A x B + C=D

We'll test this out with an Intel Pentium E6300, because it's the one I'm thinking of right now.

2 x 2.80= 5.6 + 0.2= 5.8

This can help you when buying a new CPU. I just thought that would help.