Seeing as you asked:
No GPU scales 100% perfectly, so the 18% advantage Series-X has theoretically will be lucky to get to 10% in the real world.
The CPU is only 100mhz faster with SMT enabled and 300mhz faster with it disabled, but with SMT adding 30% (using PC test results) developers would be stupid to not use it
We still don't know how much memory and CPU performance PS5's OS uses, Series-X looses a whole CPU core to the OS so if the rumours of PS5 being able to dump it's whole OS in to the stupid fast SSD when switching to a game are true then PS5 will have an extra core for gaming over Series-X.
The back end, Mark Cerny is absolutely correct when he said it's easier to keep a smaller amount of CU's busy with work then it is a load of them. CU's are always never 100% utilized which is why a-sync compute came around to use up them when the game wasn't.
Also relating the back end, fill rate, texel rate, texturing, geometry set-up is all likely to be faster on PS5 due to the higher clock speed .
The SSD can pull data in quick enough to enable a whole new method of culling, saving a huge chuck of objects being drawn outside of the players frustrum and freeing up a lot of resources. Series-X's SSD is NO WHERE CLOSE TO PS5's.....
Having to damage control because BASE PS5 isn't far off the ENHANCED next-gen Xbox is laughable as there IS a Series-S and people are going to look very silly when it releases at it's rumored 6tflops......only for Sony to release a 20tflop PS5 Pro a few years from now.
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