The colors on the day time seem a bit washed out.. there is something wrong with the saturation of the color values.
The evening picture sees too bright even though as said the picture 7 is quite nice... but the color balance is a bit off... It doesn't seem as real.. but for an illustration feeling they are quite nice.
I think this is supposed to represent a model of a site? This is what it looks like. I dont think he was shooting for photreal. Correct me if I am wrong.