It doesn't matter. Aside from interactivity whiel working, the new render engine is still not fully multi-threaded as are many plug-ins, so it's a moot point. You could have 500 cores and AE still would not run any faster than on a 6 core Mac. Aside from that there are a gigazillion otehr factors, so start by reading this:
Yes, faster clock speed is more important than many cores.
Now, other software might use more cores. For example, if you render with Cinema 4D (and you aren't using a third-party GPU renderer like Octane), C4D will use all of your cores.