First, it doesn't have to be a "no name company."
Second, I believe there are differing degrees of knock-offs. For example, there are
blatant knock-offs, where the a company mimics the exact knife and there are companies that will make several
aesthetic changes to a knife.
To me, aesthetic differences can play tricks on one's eyes, especially when we're dealing with pictures, such as the lighting used when the picture was taken.
Surprisingly, a different type blade or grind, the change in screw placement, and even grooves in the scales can change the appearance of a knife.
To truly see. . . .get the knives together, take them apart, and then make a comparison.
Example?
http://www.bladeforums.com/forums/showthread.php?t=347507