Analogy #1 above suggests there are some forms of music which can be described as prosaic and some which are poetic. The next question becomes, what makes a given composition one or the other?
For example, we might take "programmatic" compositions, which are meant to be appreciated in terms of the fairly literal scenes and subjects they evokes. But cannot a poem also evoke literal scenes and subjects? This definition does not seem to support the analogy. But there might be others.