SeanE is a comic color artist, and he's a very, very good one. I remember when he was just starting to really develop his color techniques -- I haven't kept track, but I think he's gone pro now. However, the difference you see between his page 13 and his page 1 is huge because in his older work he did the sketches himself. In a lot of the more recent work, he colors other people's sketches. Color artists tend to specialize in coloring other people's pencil and line art work, and now that he's gotten really good, he gets to work on some really good line art. But yes, aside from the sketches, there is definite improvement in his color work. I've been an admirer of his color style for a while now.