I see this and the 'normal' version, but the description doesn't state what the differences are. A lot of the episodes seems to be the same length when comparing episodes.
I subscribed to both, but so far I'm basically getting the same episode twice. An updated description for the enhanced podcasts would be great.
None the less I still enjoy all the Naked Science podcasts. These with Big Picture Science, Astronomy Cast, The skeptics Guide to the Universe, Stuff you should know, and Skeptoid ensures I've always got something intelligent and interesting to listen to. If you enjoyed this, then I suggest you check out the other podcasts I listed.