One little trap in all this is that these are all at default settings which ignores personal preferences such as saturation and sharpness, and I never just convert at the default. Soooo, I'm not sure basing a decision on default settings alone is wise or representative, but it does provide a reproducible baseline. Each of these converters are biased in their own way, Aperture tends to provide a relatively neutral file in terms of sharpness and colour, whereas Capture one is quite aggressive with sharpness at a default level(you can see some artifacts in my post).
Comparing cameras of differing resolutions is risky if you don't equalize the images carefully as a stop of noise advantage can be erased pretty quickly by higher resolution cameras.