All that has been done is to drastically downsize the images for posting, in part by using a 1:1 format on both. These were taken within seconds of each other, of the same bird (a Takahe), in patchy available light, hand-held.
To me there is very little difference between the two images, so one can get the same FoV and general performance by using a large capacity camera, and putting it in crop mode with the short FL lens.
