Answer:
Poetry differs from prose in it's conforming to metre, rhyme and music. Poetry is condensed and musical thought which technically can be fully developed, paraphrased and elongated into prose. And prose can certainly be edited and condensed into poetry by skilled hands. Therefore it can also be said that they do not differ much from each other. But one thing has to be specially noted- poetry can stand through ages by virtue of it's repetitional scope.