Surely, some of Big Bang's were written by other people and that's not even the main difference between the groups. Exo and Shinee are more dance based whereas, Big Bang seem to focus more on hip hop westernized concepts therefore they have slightly different audiences. He says it like in a negative way and it is true but there is no doubt they are ALL very talented at what they do, so don't tell me Shinee and Exo aren't talented because they sure are just as much.