So, back on the R6 II + 200-800mm vs R7 + 100-500mm comparison. I made the following table:
View attachment 24309
It doesn't cover everything, but the lines highlighted in red are the main reason I think this is an interesting comparison. There are a lot of comparisons of the 200-800mm vs 100-500mm + 1.4TC. While very interesting and pertinent, it compares two price points. Also, the annoying zoom restriction of the 100-500 with TC comes into play.
With the R7 + 100-500mm there is no zoom restriction. Quite the contrary, it zooms out wider than the 200-800mm, i.e., to 160mm FF equivalent. Also, the zoom ring has a smaller throw that is easier to handle.
After spending some time with both combos, I'd give the edge on IQ to the R6 II + 200-800mm, but not by much. The MFD advantage for the 100-500mm is big, so there is much more versatility in that regard as well. The weight and size advantage of the R7 + 100-500mm are also large.
Someone who has the R6 II and the 100-500mm, can ask the question: What is better, add a 200-800mm or get an R7? Getting the R7 is cheaper, the resulting combo is more versatile, the weight and portability better! IQ is close, IMHO, but I'd give the edge to the R6 II + 200-800mm for my use so far. The difference after noise reduction is even smaller, but I think the R6 II + 200-800mm has better background blurring. Here are links to a couple of albums
[I want to point out that Amazon Photos by default orders images from newest to oldest in albums. You should switch to oldest to newest. Once it is ordered from newest to oldest, then in the albums are ordered such that each pair of images is first the R6 II + 200-800mm and then the R7 + 100-500mm. (except for the last one where I didn't bother fiddling with the timestamps to get the order I wanted as I didn't want to make changes to the original .CR3)]
R6 II + 200-800mm vs R7 + 100-500mm
Topaz NR (Auto): R6 II + 200-800mm vs R7 + 100-500mm
And, for those who like to play around with CRAW files, here is an album of .CR3 files. Please note that the two camera bodies had out of sync clocks
This means it takes some care to line the images up in LRC. Also, Amazon Photos does some weird rendering of the embedded jpegs for .CR3 files, so this album is only useful to download the .CR3s