If they're equivalent chips (from the same generation with similar clock rates and cache) then you'll get no improvement, and potentially may even lose performance due to hyperthreading making certain things go slower.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
