From the Apple keynote, the Studio Max is as fast as a 2019 16core MacPro.
The Studio Ultra, as below:
According to Apple, the M1 Ultra's CPU is up to 3.8x faster than the highest-end Intel Core i9 iMac (which has now been discontinued), and up to 60 percent faster than the 28-core Mac Pro with Intel Xeon W processor. As for the GPU, the M1 Ultra is 4.5x faster than the 27-inch iMac and 80 percent faster than the highest-end Mac Pro with AMD Radeon Pro W6900X graphics.
Threads and ram etc are not inter-comparable between intel and Apple Silicon, as they work completely differently.