The test results on Phoronix paint a rather different picture (i.e., the 2990WX being consistently and markedly faster than any other tested processor).
My initial gut feeling reading the results on Anandtech is that Window's scheduler may not be able yet to exploit the processor's architecture effectively.
2990WX has a very complex NUMA architecture that costs it a lot of performance if the scheduler doesn't get things right. Linux has been running on and has been heavily optimized for even more complex NUMA systems.
I'm eager to see the AIDA64-fpu or any other scientific calculation benchmark on linux, as it is the area where the i9 seems to dominate the TR. Sadly, the few benchmarks I've found were on win10.
Wow, I didn't even realize how big an impact it makes. It literally outperforms everything else on a large margin except for one test, and gets like 117% more performance in ebizzy than the 7980xe.
My initial gut feeling reading the results on Anandtech is that Window's scheduler may not be able yet to exploit the processor's architecture effectively.