I chose A and I agree the EOS R is much better than the 6D Mark ii. However when looking at the video from the eosr vs sony or nikon or even black magic its among the worst in terms of sharpness. I still use canon simply because their color science still cant be beat in my option and the dual pixel auto focus is the best there is.

Also from CES the CEO of canon said they are working on a eosr camera that will be able to shoot 8k video. They said they have heard the customers and and are working on making their future cameras much more video capable (in-body image stabilization, better video capability and dual card slots)

So we shall see what the future holds. Especially since nikon just announced their z7 cameras will soon output 4k prores raw through HDMI to an Atomos Recorder. Canon will have to catch up and really make some changes in some areas for sure.