seems Nvidia is cheating again;
https://www.reddit.com/r/Amd/comments/4m692q/concerning_the_aots_image_quality_controversy/
"At present the GTX 1080 is incorrectly executing the terrain shaders responsible for populating the environment with the appropriate amount of snow. The GTX 1080 is doing less work to render AOTS than it otherwise would if the shader were being run properly. Snow is somewhat flat and boring in color compared to shiny rocks, which gives the illusion that less is being rendered, but this is an incorrect interpretation of how the terrain shaders are functioning in this title."
Main reason for AMD and 480 is they can do true async compute.
Nvidia cant.
A game developer stated amd is true async compute.
Nvidia is silent.
I know what I buy.
Also the fact that more snow in a scene is usually more taxing on a GPU anyway, this is seen in BF4 snow maps for one.