Sometimes, look and feel can give some indication if you know what you're looking at and feeling for. Even so, without dismantling one or two, it's still a guess.
Remember, the more expensive cables "look and feel" impressive and these can always be added to a standard run of the mill, off the reel stock cable. They couldn't justify the price otherwise.
But, price is not always a guarantee that what you get is "better" than one costing less. ...sometimes much, much less. The price of diminishing returns on these buggers is a LOT lower than tha marketing mavens would have you believe.
Questioning on a site like this is not a bad way to get opinions on what's real and what's an illusion. Most of the "better" brands are known.