Difference between processor of macbook and macbook pro

Hi,
So I recently went to best buy and I noticed that the macbook with a core 2 duo processor had 2.4 ghz and my 13 inch macbook pro i5 processor has 2.3 ghz. How come the macbook is faster then my 2011 macbook pro? Is there something different about the processors that makes my mac's processor better even though it says 2.4?

Yes,
You can't go by gigahertz speed of the CPU anymore as a guage of performance.
If you want to compare CPU's use this guide,
http://www.cpubenchmark.net/high_end_cpus.html
as you can see, slower gigahertz can outperform faster gigahertz processors.

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