Tony & Chelsea Northrup published a video comparing the image quality of the new Canon EOS R a with its siblings. Here is Canon EOS R vs EOS 5D4 vs EOS 6D2 vs Sony a7III vs Sony a7RIII Image Quality Comparison.
From the video review we understand that dynamic range of the EOS R sensor is better than the Canon 6D Mark II. Also the Canon EOS R definitely has a better image quality than the Sony a7 III in most conditions, with noticeably sharper images, even at high ISOs.
Check out the Canon EOS R vs EOS 5D4 vs EOS 6D2 vs Sony a7III vs Sony a7RIII Image Quality Comparison video below for more details.
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