I just received my Lajo order... an exoflpmini-fb and an exo3mini. This is just one poster's opinion, but I prefer my Jam Jacket.

My first impression of both of the exos is how "oily/sticky" they felt and that I will need to wash them before using them. By contrast, the Jam Jacket feels like the plastic they now use to make jelly bags... not sticky at all

The Jam Jacket has an open top, allowing full access to the Hold button. The exos have cutouts. You will need a long fingernail to use the hold button with the exomini. Since the exo3 is so thin, it's less of an issue.

The Jam Jacket has screen protection, but none for the scroll wheel. Since I don't seem to have a problem with getting the scroll wheel dirty, having it covered isn't really an issue for me.

Finally, it's seems easier to get the Jam Jacket case on and aligned perfectly on the first try. The exos require a bit more twisting and tugging.