The ZT mudd is a very unique knife. However, after handling it several times, I could not get over the rather cheap feeling construction. It certainly doesnt feel like ZTs other knives in that sense. In fact, I bought a 0200 instead of a mudd for that reason. Dont expect a 0200-0300 series experience if you get a 0500 mudd. It is probably a very good knife, but it isnt a tank like the 0200-0300s. (It isnt as heavy either).
The SERE 2000 on the other hand, exudes quality. The fit and finish is outstanding.
It puts many of my higher price folders to shame in that regard. I originally bought a mini-SERE and liked it so much that I bought the full size later. It is very rare that I buy two of the same brand/style of knife, even in different sizes, so I was pretty impressed the first time.
The SERE has a very good black coating on them as well, much harder and slicker than other brands I have. I avoid black blades if possible. I prefer them on the SEREs.
For the price, I would suggest a SERE long before I would suggest a Sebenza or Umnumzaan, which I also own. They are that good.