I have been watching a lot of the videos on youtube and on the different manufacturers websites about mud motors and they all look awesome.
From what I have read and heard they are quite a bit heavier and slower than a comparable horsepower outboard and like a jet outboard they serve a specific purpose.....running in mud, shallow water, over logs, and through weeds. If you are using it in an area that you are going to tear up your regular outboard doing such things then go for it.
If your regular outboard handles where you hunt and fish just fine then I would stick with it.
I currently live in North Fl (just southwest of Jacksonville) and I thought a mud motor would be perfect for the swamps, creeks, and saltmarsh's around here. But everyone I talked to when looking for a boat and motor told me I should just go with a conventional outboard.
They are still super cool and look like they are so much fun. I still want a "mud boat" and a jet boat as well.
How could you not want one of these??? https://www.youtube.com/watch?v=4rd2d3PQSiA