Canon Control Ring Mount Adapter EF-EOS R

Any difference using this with the canon EOS R5 and canon EF Lens. Thinking about getting an EOS R5
canon EF 400mm 2.8 IS II
canon EF 600mm f4 IS II
canon EF 100mm macro 2.8 IS
canon EF 16-35 2.8 II
canon EF 70-200 f2.8 IS II

Got to many EF lens and don't want to buy any RF Lens

I have all of those lenses except for the 600. Mine are working great on a R6 using the Canon adaptor with the control ring. In fact they are better on the R6 than they are on my 5DIV.

I have the control ring and filter adapters for my R5 and have been happy with both. Even my 85L feels a bit snappier on the R5.

Each lens will perform the same if not better when used on a mirrorless body, primarily due to the superior AF system. The real downside is that you add up size/weight. I didnt think it would bother me, but it makes some of the small to "normal" size lenses feel a bit awkward to handle. Your 100L is going to feel like you're aiming a cruise missle. My Sigma 35A just looked silly with the added length of the mount, but with my 100-400, I barely notice the difference.

I have control ring and filter adapters for my R5 and I only like the filter adapter!

Is the control ring adapter worth the extra $100? What do you folks usually assign to that ring?

I have a Speedbooster which has a control ring on it, so I'm tempted to get the control ring adapter just for consistency. I figure I would probably assign aperture to it.