More cores or faster clock speed

I’m new to the Unreal Engine and I’m having difficulty finding info on how the Editor uses CPU cores but maybe my search skills are weak.

I’m building myself a workstation for lots of different hobbies I have. I do some 3D rendering which will take advantage of as many cores as I can get, but how does the Unreal Editor use these?

I’ll probably build a dual Xeon e5-2011 system as I have a dual socket motherboard and 64GB of ECC from my previous setup. Would I be better off with fewer faster cores or will the Unreal Editor use all available cores.

Any advice would be appreciated.