CoD vs some other sims that model Kent?

[jibo]

about WoP i suspect the game has to run on 512MB platform (xbox/ps3) therefore
they use this dominant color trick yellow/green/grey filter in order to reduce the palette
so you won't have the vivid colors available in RoF and CoD, the dynamic lightning is also impacted especially on the ground, where everything looks a bit dead and depressive.
Behind the haze there is also some blur going on to smooth the whole thing but all in all it's consistent and works well to give this ww era touch.