<- Mash
The general advice is go for a machine with a high GHz speed to make it fast to work with, even if that means having fewer total processing cores. when you are sitting there at the keyboard, you will feel the GHz speed as you are working, all those extra cores will mostly sit there doing nothing. Pretty much only when you press render and go to make some coffee will all those cores truly help.
2.3GHz 20 cores Xeon = 20% faster when rendering
4.4GHz 8 cores i7 = 80% faster whilst working
It isn’t worth losing all that editor speed for such a small improvement in render speed.


