http://bugs.winehq.org/show_bug.cgi?id=10677
--- Comment #7 from Stefan Dösinger stefandoesinger@gmx.at 2007-12-15 16:28:43 --- Consider that you're looking into the sun, so the game might bright up your whole screen.
Post processing effects are quite often ugly and way too strong. In many games they are a matter of taste. If I saw the screenshots without associating them to a bugreport I'd say that the first is rendered with post processing off and the 2nd with post processing off.
However, that's only guesswork. I think a comparison screenshot from Windows will be very helpful.