PS5 resolution is 3200 x 1800, or 5.76m pixels. Xbox Series X is 3840 x 2160, or 8.29m pixels. In other words, Xbox Series X is pushing about 43% more pixels than PS5. On top of that, Xbox Series X has the high setting shadows from the PC version while PS5 has the medium setting shadows from the PC version. PS5 does have a framerate advantage, but only on a single area of a single level pretty much, the rest of the time they are both 60 fps. Seems like a victory for Series X overall to me.

That isn't what he is disputing.  He seems to think that if the resolutions were left dynamic, the power of the PS5 would magically push it to 4k without any other optimization, and somehow raise the shadow setting as well.

When did I say that? I'm basicly asking why lock the ps5 resolution at 1800p? The Xbox is allowed to drop in framerate why not allow the ps5 to do the same?

The mistake with your comparison is that dynamic resolution is the result of the console strugling and droping resolution. A locked resolution is dev made. As in it could be higjer but devs dont allow it.

PS5 resolution is 3200 x 1800, or 5.76m pixels. Xbox Series X is 3840 x 2160, or 8.29m pixels. In other words, Xbox Series X is pushing about 43% more pixels than PS5. On top of that, Xbox Series X has the high setting shadows from the PC version while PS5 has the medium setting shadows from the PC version. PS5 does have a framerate advantage, but only on a single area of a single level pretty much, the rest of the time they are both 60 fps. Seems like a victory for Series X overall to me. 

I suppose they could implement an optional resolution mode on PS5 that is full 4K, so we could get a like for like comparison with Series X, but based on the fact that it seemingly took a 43% pixel count reduction and a shadow quality reduction for them to hit locked 60 fps on PS5, I suspect that if PS5 did have a native 4K resolution mode, the framerate on it would drop much lower than the 50 fps that Series X drops to at the lowest on the outdoor flower section on the single level. 

And you don't have any guesses as to why that is? Or do you think they did it just because they liked that number?

Hard to say, only IO devs know for sure, but my suspicion would be that they tried native 4K on PS5 and the framerate drops were lower than they are on Series X at 4K, low enough that they felt that people would complain about the game being stuttery. Maybe they had drops on more levels than just one on PS5 at 4K as well, Series X only drops below 60 fps on that single level according to DF, and the game has 20+ levels if you import all of the Hitman 1 and 2 levels and their DLC levels. Also worth noting that Series X already has variable refresh rate support while PS5 does not, VRR can make that 50 fps area on Series X look much better if your tv or monitor supports it. 

yes microsoft paid them off