i have gotten this one a few times.they are alike in the way that they are writing from the heart and using words as color to paint a picture. they are different because of the element of music that changes what you would write. songs for the most part need to have some kind of rhyme to work. to describe something using the voice as an instrument to set the mood. that goes with the feeling the music is creating. writers also have works that need alot of feeling but the element of music is not there. also a song can have fiction fact useless combination of words for color that sound good or mean something about that person (rap hip hop music). we can be more vague as to leave the listener guessing what the lyrics are about. a writer has to be more to the point as you are explaining something to be understood.