Higher End USB Cables

Anyone tried/compared the newer high-end USB Cables (i.e. Locus Design Polestar or Ridgestreet model)? Curious if they're worth the $300+ price tag, particularly since Locus doesn't offer demo or return policy (can't speak to Ridgestreet). I do know there's differences in the cheap throw-away ones, much like different USB ports on the same computer.