Funny... I was browsing through your art archive the other day, and the first picture is the one I liked best. It sort of stuck in my mind. What I like most about it is that I almost expect them to move just... now. Very alive and real...
I don't think I dislike the other picture. It has a lot of things I like, the background is great, the characters are well-drawn, the colours.. but it feels... dead, compared to the other picture. Might be Harry's hair and Draco's stance.
But I'd still love to be half as talented. It *is* a great pic, just not as great as the first.