The main thing I noticed from the first time I used ZeroGs is that game screen always looks like out of focus. Recently I found that if savestate is loaded, first the picture is clear but the next moment it is not. To demostrate what I mean I post screenshots from macross SDF. Screens _a_ are made in the first moment after loading gamesave, _b_ is the common look of the screen.
Also colors in ZeroGs differ from gsdx9. I post a gsdx9 image. It is the one which shows only half of the screen
But colors look more realistic in it.