Hi,
My focus here is on demosaic artefacts and not about colour. But, I did an empirical test on colour rendition using an IT 7 target
here. What I have found here was using Lightroom with a camera specific colour profile for the P45+ was
more accurate than Capture One used with the "Film curve" using linear, C1 was a bit more accurate than Lightroom. The Sony SLT 99 was most accurate, however.
A problem with this tests is that the Delta E calculation does include lightness, which is affected by tone curve.
One interesting observation in this test that some blue colours had extreme errors in Capture One, but those were not visible on screen, depending on the limited gamut of the computer screen. So I have DeltaE = 17 but is not visible on screen, because of gamut lmitation. The same difference may be very much visible in print!
Best regards
Erik