Another article on the same site (Blue Jeans Cable) makes the interesting point that some kinds of cable are more expensive not because they are better at reducing signal loss but because they are rated for more fire-resistance for certain kinds of installations.[1] The article points out that more expensive is not always better if by "better" you mean "less likely to distort the signal."

[1] "Good, Better, Best -- Or Not?"

http://www.bluejeanscable.com/articles/good-better-best-or-n...