Hi again!
So the test would have a camera with APS-C sized camera. For this test I believe there won’t be a big difference which model it is. Take 3 photos at a distance of approximately 300 meters (980 feet), but definitely all there at the same distance with the same camera:
1) one photo with
EF-S 18-200mm f/3.5-5.6 IS Lens (or similar EF-S lens) at 200mm
2) one photo with
EF 70-200mm f/4.0 L IS USM Lens (or similar EF lens) at 200mm
3) and one with
EF 200mm f/2.8 L II USM Lens (or similar EF lens) which has fixed 200mm
4) unfortunately there is no EF-S lens with fixed 200mm, that I would know of.