Along with the Image quality test results shared yesterday, vignetting, and distortion test results along with specs, measurements, and standard product images have been added to the Canon RF 70-200mm F4 L IS USM Lens Review.
Here are a couple of comparisons to get you started:
Visual Canon 70-200mm Lens Comparison
Canon RF 70-200mm F4 L IS USM Lens Compared to Canon EF 70-200mm f/4L IS II USM Lens from a measurements and specs perspective.
The Canon RF 70-200mm F4 L IS USM Lens is in stock at Amazon USA and coming soon to B&H and Adorama.
Rent the Canon RF 70-200mm F4 L IS USM Lens from Lensrentals.