This is actually the best breakdown of the hardware and how the variable clockspeeds work yet. It also covers some of the concerns many have voiced over the last day or so.
On top of that he offers a fairly detailed explanation in to why the absolute peak theoretical performance will rarely be reached on either next gen console (in reality the clocks and usage of the CPU and GPU constantly fluctuate during frames whilst running a game), and why the PS5's GPU would only need to drop a couple of percent (or around 50 MHz, eg down to 2.18 GHz) to claw back a pretty significant amount of power in the rare absolute worst case scenario it does hit its power limit.
In other words, it really is 10.3 Tflops vs 12.1 Tflops, unlike what others were trying to infer by clinging to the Github leaks (9.2 Tflops). Add to that, the higher clockspeeds do have their own set of advantages too.
He also talks about potential bottlenecks or limitations in both systems in relation to one another, and the advantages of the PS5 vs the XSX and vice versa.