Perhaps the more expensive knife is the original, and the cheaper one is a "knock-off". This sort of thing is very very very common in the knife world (especially when the Chinese are involved).
The other day I was flipping channels, and came across the Home Shopping Network, and they had a seemingly great offer; it was something along the lines of 120 knives $200. The knives may look good on TV, and a fair amount of design may go into them- they have liner locks, or lockbacks, but as knives, they suck. They fall apart, they aren't sharp, they are just junk which are made overseas for only pennies, and the American businesses bring them here and sell them cheap, but for large profit.
-I am not talking about Spyderco or CRKT, which are decent knives made in Asia,
I am talking about Frost, and Emco, and a few other companies that thrive off of Americans' unsatiable need to save a buck or two on nothin' but fecal matter.