The extra noise in the cyan patch reminds me to Sony sensors, Canon might be weakening further the CFA to improve the SNR...
You should keep in mind Iliah's point below, that the studio scene is a conversion and not necessarily an accurate representation, it requires analysis of the raw data to get more accurate measurements.
I just used the image of the swatch as a visualisation of the process because the noise was so clearly visible, but that doesn't mean it's accurate. Perhaps it was the wrong thing to show, and a distribution graph would have been better, but I liked the idea of relating it back to the color swatch.
The jpgs from the R6 and 1Dx III look really beautiful and elegant to me, but in raw the files might be getting harder to process if they look more like Sony.
Perhaps it depends which Sony, but my A7 raws were nothing special either.
And I used Aperture rather than Lightroom, I'd always found Aperture to be the better processor (although increasingly lacking in edit features) but even in Aperture I was never impressed with the A7 raws.
It's hard to put my finger on why, but they just never really captured what I expected from the light.
A quick example.
I rode a motorbike down the the Bamboo Trail following the Mekong in Laos. Somehow I'd made it across all the wood and wire rickety makeshift bridges and reached my goal which was to get to the beautiful 4000 Islands just above the border with Cambodia.
One evening I'm enjoying a Gin & Tonic by the Mekong during golden hour, watching the activity on the river pass by.
There's an uprooted tree across the water and the golden light is reflecting beautiful bright gold, the same light that's illuminating some rusty flowers or dead foliage in the bright and lushly lit trees nearby, and brushing the leaves at the top of the tallest magnificently arched tree.
A small boat transporting some locals turns to head in my direction so I grab the A7 and snap a capture of the scene. That will make a nice memento of this lazy relaxed moment.
Later at the computer, the camera raw delivers me this:

4000 Islands, Laos - initial raw conversion
What nonsense is this, where did my light go!
I think I understand raw and know this is just the start, but still, I wasn't expecting to have to paint the damn thing.
After 15 minutes (or maybe it was 30) trying a number of techniques, I start losing interest and settle on this:

4000 Islands
It's not great but it will have to do, the poor locals faces are already way too orange and trying to get more gold just seems to mess up something else up and makes it look faker than it already does.
I have thousands of A7 raws from this amazing Mekong adventure but there's not more than half a dozen I'd show you if I was trying to sell the camera (which I already did now)
the nature photos I’ve seen from the 1Dx are magnificent, but them I’ve seen posted some sports photos and I was not a fan of the skin tones at high iso, most probably it was the raw processing in Lightroom.
mine key point for me of Canon raws is the camera standard profile in Lightroom that we don’t have anymore, and Adobe profiles are generally not to my liking.
I tried to make a calibration profile using lumariver and the raw from dpreview (from the 1Dx) and the default matrix with no tweaks shows light skin twisting towards pink and dark skin towards warm, just like Sony sensors. With the EOS R, the light skin twists towards warm, which I find more pleasing.
so yes I think this CFA might be cooler and less typical Canon.
And interested to see more about the R5, because so far the jpg I’ve seen don’t look as “refined”.
irene rudnyk has a video shooting both cameras and to her taste the colors are improved over the eos R she says, and she perfectly matched both cameras in one picture, but actually looking at the rest of them, it seemed that consistently the R6 was producing nicer images, so yes, maybe the R6 files are easier to handle.
i will switch from Sony to Canon in the right time, and one of the most important factors for me is color, but also the IBIS.
If I see myself struggling in Lightroom as I do with Sony, I might go for the eos R because it has the camera standard profile that works nicely for me.
let’s see.
It's an excellent point you raise, perhaps indirectly.
With libraries of perhaps tens or hundreds of thousands of images, an App like Lightroom becomes a more integral part of the system. It becomes more compelling to use the same app for processing, to the point where if it doesn't handle the raws for a camera well, it may affect the buying decision.
I don't really know if there's a raw processor that would have been able to do better with that Sony image, I tried Adobe and also DarkTable, or if the issue is really with how the raw has been captured, but I know I'm definitely ready to return to Canon now they have committed to mirrorless. I'll make the decision which model when I start preparing for my next excursion.