"In some ways it is kind of like the difference between a Hyundai, a Lexus, and a Ferrari. (Without the maintenance headaches of a Ferrari. ) It comes down to attention to detail, fit and finish, quality of materials, machine finished versus hand finished, plus pride of ownership."
The Ferrari is more likely to put you in the poor house if it breaks, and will be more likely to the abuse inflicted by the overcompensating dude thinking it's indestructable.
You can by a Nokia Cell Phone for $80 made on the same line as the $20K 24ct Gold Plated, leather bound, diamond emblazened Ferarri phone. Both are still made with the same parts. The both are functionally identical, and both have the same warranty, same life span. The $80 and 20k phones, once they die, are both paperweights!
Knives are the same, unless they are preserved in the box in a humidity and temerature controlled environment, which will only prolong their life for a while. Only then are they an investment, otherwise they're a the same value long term, the $300 Emerson or the $50 SAK.