I prefer B, because it's different.
The artwork is beautiful and the style you worked on with it looked absolutely gorgeous, I told you time and time again how much I would actually use that style, was a tad disappointed you never went through with it, but it's understandable.
Styles on PC typically make up of the random casual art of a character or a Pokemon in the header, but B makes use of a beautiful evening scenery that never fails to appeal to me.