I think they might both be from the same or related studios? because they are both Cartoon Network shows - and CN had a deal with Bandai.
My friend is obsessed with CB, which I don't get... I couldn't get that involved in it, honestly. I'm a shoujo girl, I get drawn in by romance and character development. But the style is fantastic. When I was watching the other night, the Pierrot le Fou episode, I was so impressed by the animation and the design and the general style of the whole thing. Pretty good show.