no thats not correct for this game. True some better/newer IPC, but for this game not one bit of difference even back to Conroe CPUs..... If you had all the CPUs from 2006 till now at 4ghz, there would be no diff for this game except the RAM speed. Which is new IPC-ish. (And does make a diff). You think CM engine is using new microcode/ instructions SSE4?, AVX?
A Kaby or Ryzen CPU with their DDR4 will be the fastest , but not by a "lot" over DDR3 CPUs in this game