틀리다 means being incorrect, and three of these lines pair it directly with 맞다: 뭐가 맞고 틀린지 노 코멘트 할게요 (I won't comment on what's right and wrong), 누가 맞고 틀리고는 없다. It also covers slipping up in performance — 가사 안 보고 틀리지 않기 (get through it without the lyrics and without a mistake). Textbooks insist 틀리다 is only 'incorrect' and 다르다 is 'different', though speakers do use 틀리다 loosely for 'different'.