Chinese army knives are crap. The tools are poorly finished, the screwdrivers will strip screws, the blades are dull and badly ground, you can't get easy replacement springs for the scissors, and all the tools either have lazy snap, or are so stiff that you break your thumbnail opening them. And as far as the knife blades themselves, with a real SAK you know you get steel that takes an edge and holds it (reasonably, for the price) well. With the Chinese made ones, you get some unknown steel that can't keep an edge.
A real Swiss Army Knife, be it Victorinox or Wenger, will last you many years, and has a lifetime warranty in case it doesn't.