Hmm there are some diferences betwen anime and manga, first anime is quite tonned down. So we dont have in anime things like, ikki with his ass full of firecrackers, or skullsaders leader raping a girl, or some other situations. Still its good to read manga and watch anime from the start. Cause anime wont cover manga chapters no matter how hard it would try. And yes I think that its good that anime went another way. Still You need to remember that there are animes which are exactly same as manga and are still good, cause peps want to see stuff animated (for example claymore).