I find the main difference with originals and knockoffs is weighting, and weight transfer systems. Knockoffs don't always have the proper ballasting, so I add BBs, and most don't have weight transfer systems, to help with casting, so I try and figure out how to add BBs to do that, too.
There is no doubt that the weight on a cable system used by Zip Baits, and other high end Japanese bait makers, is by far the best.
But I don't want to lose a $20 lure in snaggy brush, when I can by one for $1.75, do a little work, add hooks and split rings, and fish without sweating whether or not I get hung up.
As it is, I keep a lure reliever on my deck whenever I fish, but windy days make saving cranks a risky proposition at best.