The thing is, Dylan's is better produced as well. What's great about the original, apart from the utter conviction in Dylan's vocals, is the fact that you can listen to the instruments as a unified whole or separately; you can pick out the piano, the organ, the lead guitar, the rhythm guitar and bass, and focus on each separately, which helps to generate multiple different listening experiences. In Green Day's version everything is just buried under a mountain of guitar; there's no nuance whatsoever.