There are no extra features on the digipack version of the disc. Same songs, same track listing, no videos.
There is a lovely black & white photograph of Tanita on one of the panels of the sleeve (a photograph that isn't in the booklet) but the rest of the cardboard sleeve design is simply clouds and sky.
My digipack came from Amazon.fr. If I had known that there was another source selling the disc in jewel case version, I would have used that source, not because this particular digipack is bad, but because I dislike digipacks, especially the glossy ones - it is impossible to handle them without making a mess of the cover. Even worse are those digipacks that simply slide the disc into a slit in the sleeve without a plastic tray.
The "use" of the jewel case is it's protective plastic - it is especially important if you are clumsy like me.