First, I’m NOT picking a fight with @Torq, but there are several things going on here.
“Knock-off” is a tricky word in technology, as the competition is constrained by function. Nikon and Seiko got started with models derived from the European originals, and then moved into new markets and new products. It’s also why there are 1,000 companies selling guitars derived from Martin, Fender, and Gibson.
Second, from a functional/electrical performance standpoint there’s often a point of diminishing or un-measurable returns. I’m not confident that any benefits will be realized when high-end cables are used for Elegia drivers (and other signal chain bottlenecks).
Finally, some derived designs perform far better than the originals. It requires case by case evaluation.