Sony/Cerny focuses on balance, so they won't incorporate a huge bus while they cant feed it accordingly. Also MS used a mixed module configuration because for each bus width there is a set number of manufactured chips and thus configurations, here is a table to explain things:Tech Guru wroteIt will have a relative RTX2070 super class perfromance in raw rasterized rendering , with optimized titles like Sony Exclusives
Native 2160p High Setting / 60Fps or 120fps on Pesudo 2160p ( as the current PS4 Pro Does ) - Checkerboarding , Dynamic 2160p , 1800p upscaled to 2160p.
Lot of Hype and fake percetions , actual perfromance will be like that.
Added , for 2160p 120hz a decent 55-65" 4K Real HDR HDMI 2.1 TV is needed ~ 2k USD.
It will have a 6 years Life Cycle for a 2080 and a CPU < i7 9700k level performance + a new tv investment for the 2160p 120fps feature (HDMI 2.1)
It would have been much better for the ps5 to have 352 bit bus interface ~ on GDDR6 rather than a 256 bit bus interface. This will give a real graphical computational power not a 5.5 Gb /sec SSD.
A Gen 3 PCI current NVME nets 3.5GB / sec vs 5.5 GB / sec nets a few seconds less in loading & textures streaming.
Nevertheless, if Sony continues its trend on solid exclusives. PS5 will seal the deal vs Xbox Series X.
One point I really dislliked about the Xbox Series X and it needs proprietary expansion card. It will only accept the Xbox Series X Storage Expansion Card. It’s being developed by Segate. The PS5, on the other hand, will have an expansion bay for an off-the-shelf M.2 NVMe SSD giving it more flexibility.

DF clearly explained the different approaches here, and in some cases the XSX might be bottlenecked due to the huge GPU and CUs which requires a relevant number of ROPs, memory and memory speed to be fed. DF also stressed that the clock speeds on PS5 are ambient temperature agnostic.
Currently there is not much to talk about which matters the most...Games, both didnt talk much about games (if at all) and MS focused on backward compatibility, yet again. I know they have a dedicated team for it, but still this is a brand new console.