My go to lens is the Sony 200-600, but having the Sony 100-400 G Master at hand (and hardly used since I bought it), I took it to my wildlife hide for a test shot session.
I really want to test it for birds in flight but the light was poor again today in the UK so I just concentrated on static subjects.
As you can see I used the A-PSC mode in the A7r4, but I think you will agree that the image quality is outstanding.
The next set are taken with the Sony 200-600 lens.
Compare the top to the bottom and form your own opinion.
The Bokeh on both lens is beautiful.