From my experience with the 2 5600x builds from friends, all that stuff barely matters for the little 6 core cpu.
You can't really get more core clock out of it no matter the mobo quality and it's so efficient, that it doesn't really stress the mobo either.
The highest memory you can run is 3800 mhz with the infinity fabric at 1900 mhz.
But that's already a heavy oc and from my testing last week with 4133 mhz ram in my 10600k, past 3200 mhz, there's barely anything to gain.
That's why I would simply recommend to get the cheapest "quality" motherboard with the features you need.
I can recommend the msi mpg b550 gaming plus.
Lots of slots, USBs etc.
According to some videos the vrms are not the best, but solid and it has a fewer layers than the more expensive boards.
But the one friend of mine only paid 104€ for it and it runs absolutely stable with 2x 8 GB 3600 cl16 and a slight pbo undervolt + higher boost clock.
The thing about these 6 cores "budget" CPUs is that you buy them not to be future proof but to have the highest performance for simracing right now.
So saving 100-200€ in the motherboard and another 50-100€ on the ram almost equals another budget cpu build in 2-3 years with a 6600x or 7600x!
3 threads would mean 90 fps with the amd and 71 fps for your current cpu.
4 threads = 90 for AMD, 66 for yours.
I don't have data for 8 cores but since you're running only virtually 8 cores, the 6 core / 12 thread amd will blow it out of the water, naturally