Very interesting observations ! I agree although once setups in both are optimised as much as possible, there are caveats:
VR in MSFS does seem foggy in comparison. Foggier though way more detailed under the fog. This can definitely be improved by pushing Render Scale upwards & adjusting various detail settings upward & downward. Or even so that FPS pushes downwards towards 22.5 fps & reprojection to 90 fps. That’s not so bad though the foggy & wobbly qualities can be accentuated in many situations. Prop texture mods help but there’s still a considerable loss in fidelity.
For my own definition of clarity, it’s best to get highest fps without enabling motion reprojection.
With Aerofly FS2, it’s possible to get much higher fps without motion reprojection though with much less detailed & animated scenery. One exception is the community created Hawaiian Islands. The high-end batch file option enables maximum animation including ships, boats, birds, limited air & road traffic.