Screen resolution

No. That's the iPhone 11 Pro, not the 11 Pro Max. You can notice that the display size is different (5.8 in vs. 6.5 in). Try comparing the 11 Pro with the Xs.

What's important in determining resolution is the pixel density especially when the display size is different.

Sorry for confusing you. All iPhones have a great display, that's for sure. But, you can't compare the resolution of 2 screens different in size by looking at the number of pixels. You should look at the pixel density in ppi (458 ppi for these phones).

The screenshot you posted above is not comparing the iPhone 11 Pro vs the 11 Pro Max.

The models have identical pixel resolution, and identical brightness.

Please stop.

Exactly which part of the screenshot of the display properties I posted are you not understanding? The display properties are identical.

the image he posted show that apart from the size all other specs for the to screens are the same..

it means the screensize of the xs max is 6.5" 102.9cm^2

and the 11 pro is 5.8" 84.4cm^2

so a bit smaller so a bit lower res but likely the same type of screen given all the other specs are similar