They'll both, assumedly, be x86 based and most likely offer an evolution of more modern AMD offerings. Not to be a downer, but what kind of differentiator can a next gen Xbox or PS be expected to bring this time around?
The major thing I remember being technically "exotic" with the Xbox Series X and the PS5 were how they both used different techniques, with compression and a few hardware tweaks, to speed up storage access. Which is great! But didn't seem to give either console an edge in anything in particular. But perhaps I never understood the advantages adequately? Which isn't unlikely.