I just recently finished watching anime "BTOOOM!", and of course an open ending left me very curious about what will happen next. Hence I started reading the manga (currently chapter 6th) and I'm wondering if there are some major differences in plot, characters' development, etc. later on, since at this point I don't really see too many. Also, do all 9 volumes really correspond to those 12 episodes of anime (if yes is there really a point in reading manga, since I know what will happen and what's worst I will not learn more than what I've already seen in anime)? And the last question: manga or anime, which you liked the most =P?