To me they look almost the same as they do to you. From what a friend told me is that you make less water changes and it makes your tank more stable. The mud is supposed to do certain things which I don't remember right now.
To me IMHO
they have the same purpose, except that one uses the expensive mud and the other is more of a DIY project which in turn is much less expensive.
Anyone care to share some info on this matter? TIA