My two cents:
All the writers before are IMO right. I do not own the 70-200 II anymore, because I am really really happy with the Rf version. The AF on the RF works faster and the sharpness is - to use an influencer´s term- "mind blowing".
. The IBIS is much better, let your shutter speed come down double the time ans still works great.
There are several reviews out there, where you can imagine the difference. There are a lot influencers out there, I know. But maybe you go on an Canon marketing show where you can lean it for half of an day. Or your rent it from an company for one day.
Believe me, this lens is really extraordinary well gesigned.
I do not say, worth the money - Canon´s prices are incredibly high. Compared to Sony, felt double the price. I hope, the RF mount becomes "free" and we see Sigma lenses too. as they are even sharper.