I may have misunderstood the science here(quite likely) but the source you quote seems to suggest that P3200 has a resolution the same as TMax400 and is better than the colour film you give as an example.
I am particularly surprised that P3200 matches Tmax400 and beats I think it was Portra you mention
Good as P3200 is for a fast film my limited experience with it suggests to me that even at a 5x7 size print a P3200 neg doesn't match a TMax 400 neg
What's others' experience of this?
It's why you don't compare numbers from separate sources, because there are so many differing ways of defining the measurements. Note also that resolution and graininess are not that well-correlated.