Had a few minutes this afternoon to try a quick test for center resolution-- shooting wide open I am not usually concerned about the corners
Yes, I am aware of the unscientific nature of the test, finest jpegs arent going to reveal what a raw file would, etc. BUT, these are at least apples-to-apples, same settings, same distance, etc.
About 2.5 meter distance to target, spot metering with +1.3 comp, tripod mounted.
Tested: CV Nokton f1.1, Canon EF 1.2L, Canon RF f0.95, CV Nokton f1.5, Olympus OM f1.2.
Im more surprised not at the difference in resolution, but the lack of differences. They are certainly there, but are more subtle than obvious-- the CA is more of an issue than differences in resolution.