I have used alot of them over the years, and wouldn't have the CS or any made other than Nepal.
BUD K is a cheap but heavy duty tool. The 'peasant' model. It will need some serious edge and handle smoothing/reshaping. Sheath probably too. Large and heavy. Cheap though.
The one on Amazon appears to be the real deal. Way better than BUD K. Price is reasonable, and quality looks good. I'd get it if I needed one.
Once you know what the real thing is you won't settle for a western made copy.
Also search for an used one on craigslist - where I got a really good old WW I model. Nicer shaped 'long leaf' blade, better steel, good feel. My favorite.
LUK...