Just to correct something...
1800p (3200 x 1800): Is actually a 30% difference pixel count.
The PS5, with its 17% power difference would more likely in the worst-case scenarios see dips from 3456 x 1944 (19% difference) to 3548 x 2016 (12% difference). Those are also all true 16:9 resolutions (divisible by 8) so easier to scale. And this is all deterministic, resolution scaling is a direct by-product of shader proficiency. Because that exactly what the shaders do, color pixels.
This doesn't mean in any way through that the PS5 will be running games at any one of those listed resolutions constantly though. Is kinda like this instead; XSX@4K30fps is actually running internally at something like 4K45fps most of the time but outputting a steady 30fps. That FPS buffer of 15fps is what keeps frame rates from dropping below 30fpswhen things get busy.
The PS5 thus has some leeway. So the PS5 would be internally running the same game at like 4K35fps most of the time, but those times when things get busy, the XSX will hold its native 4K rez and maintain its 30fps, while or the PS to maintain ts 30fps it would've to drop the native rez down to like 2016p.
These however are all things that would be impossible to notice.
I said 1800p or HIGHER, which could easily be 2160 p (true 4K) as well in less demanding titles or the same resolution with a bit fewer frame rates or identical resolution and frame rates with a notch down on graphical settings or in some cases no difference at all. What will happen in most titles, in my opinion though, most developers will target 60 fps with dynamic resolution. So we will get 60 fps on all consoles regardless (with basically the same much better CPU) but the resolution will scale dynamically. For Series S, it will jump between 1080p and 1440p, while for PS5 and Series X, it will jump between 1440p and 2160p, and usually between 1800p and 2160p. I'd say, Series X will be closer to 4K overall, but the 17% arithmetic difference is only perceived as a 8-9% difference (in both axes) and any difference less than 10% is usually unnoticed by the brain, or at least not cared about.
In short 92% x 92% resolution for PS5 is practically indistinguishable for 90% of the people, not really a big deal for the rest. For all intents and purposes, these machines have the same power.
Regional Analysis (only MS and Sony Consoles)
Europe => XB1 : 23-24 % vs PS4 : 76-77%
N. America => XB1 : 49-52% vs PS4 : 48-51%
Global => XB1 : 32-34% vs PS4 : 66-68%