The CPU isn't particularly relevant is it (although the CPUs in the PS4/XBone generation were exceptionally terrible compared to what was standard on PCs at the time)? Graphical fidelity is going to depend much more on the GPU (although the CPU is going to bottleneck framerate if it's not powerful enough).
In the current generation the Series X has a more powerful GPU than the PS5, which tends to mean a lot of games run at higher resolutions on the system, although there's some games that run slightly better on PS5 (I think the Call of Duty games might be in that category?). And a lot (most?) are basically the same across both systems - probably because devs aren't bothering to tweak cross platform games separately for the two different consoles.
In the current generation the Series X has a more powerful GPU than the PS5, which tends to mean a lot of games run at higher resolutions on the system, although there's some games that run slightly better on PS5 (I think the Call of Duty games might be in that category?). And a lot (most?) are basically the same across both systems - probably because devs aren't bothering to tweak cross platform games separately for the two different consoles.