> Core i9-13900KS consumes 150W with 24 cores (8P+16E)
No, the 13900KS has a nominal "TDP" of 150W. That's a marketing number, not a measurement and not even a control target parameter for the default boost management settings. Out of the box, a 13900KS in a typical desktop motherboard will happily draw more than twice that, indefinitely, if you can cool it and have a workload that can actually keep all of those cores busy: https://images.anandtech.com/doci/18728/13900KS%20Power%20Gr...
If you want to compare per-core power, you either have to use a power number for a workload that's actually loading all the cores, or divide the measured power by the number of cores actually in use.
so an average of 6.25 watts per core
which is less than a Pentium 90, a 1994 CPU running at 90Mhz
in absolute is not a 20x worse TDP, but it is relatively to the gain in frequency and performances (more than 20x actually)