same meaning so you can exchange each other. but "nante" is a slightly polite or elegant expression. these two words are spoken words (non literary words). and often use sometimes to despise something, i think. i hate you anata nante kirai anata nanka kirai anata ga kirai i love you anata nante suki (inappropriate) anata nanka suki (inappropriate) anata ga suki is this answer you want? there is some typyes of meaning and using both "nante" and "nanka". if its not, write sentences you confused.