It invariably the processor that is announced just after you make your purchase.
Usually it is twice as fast for half the price.

This is likely the wrong forum to as such a question.

Try tomshardware.com they do game reviews

The choice is often not just a CPU decision, rather a complete system decision.
CPU, motherboard, RAM, Video card, etc...
As well as which "game" you wish to run most often.

Jim Dempsey