Thanks for saying it Not sure what value to put to it though. My 5DSR is great, just like my D850 is great. But really why is that you come with this comment? Is there a flaw with my pictures that make you comment this or is it because you made a visit to DxO Mark recently. Or do you ask me why I shoot with the Canon?
Yes, the problem is that beautiful golden light on the lush green pastures. The Canon dyes always had, and still have a problem with dark green and dark yellows. You get those muddy brown and inconsistent colorshading artifacts, even visible on thumbnails. The shaded yellow turns gray, etc. I can spot a Canon file from a mile away because of it. The midtone colors are brilliant, but the deep dark tones are just bleh.
Mind you, I can also spot a Sony file from a mile because those dyes have a tendency towards fluorescent green, which brings me to my point: for
your particular photography with lots of lush greens, golden yellows, and deep earthly browns, bathed in that beautiful warm Tuscan light, it probably pays to look elsewhere.
Rumour has it that there is a new Fuji in town... ;-)