I think the difference is the Lighting connector. I don't think they have (or will be) releasing an iPod dock with the new lightning connector so why would they make the Mini Dock with the Lighting connector? Yes they will have to update as the new iPad's will release with the Lightining connection but I doubt that the Dock's are that much revenue for Crestron to spend a bunch of time and money into re-designing them with the new Lighting connector, just to have to re-design it next year for the next new apple product.

Just my $.02