Yea, if you go to the 1st post in that thread you can essentially read it as if I wrote it today about next gen 2K21. Everything still applies exactly the same way. USER sliders affect how tough the defense is against the USER, CPU sliders affect how tough the defense is against the CPU. So they're "reversed" in that you'd expect the USER defense strength sliders to affect the USER's defense, but it affects the CPU's defense instead. And same goes the other way for the CPU.
I also posted a minor update to the Speed/Accel/Movement thread so that everything would be accurate there as well.