from what I gather, KMs' and MZs' are very similar in quality and overall construction.W/the new KM brass line being the exception, most KMs' and MZs' are stainless steel.They are both well made and sturdy.
Syrians, on the other hand are almost always solid brass. They smoke as well as most egyptians but are much more ornate in there design.
Myas are nice hookahs as well.They have very impressive glass work and many can be converted from 1 to 4 hoses easily.Why they are s pricey is beyond me. Maybe because they can be?