Well put Big D, materials do make a difference, strand material and the dielectric (fancy wording for the jacket material around the actual conductor) can drastically effect over all resistance and capacitance of a cable. In car audio it will be hard to hear a difference -mostly because how over amplified the bass is (good in one respect, but not for natural listening) and the added road/wind noise while driving It wont be a night/day difference, there a subtle differences and after 150dB @ 40hz, you wont notice it one bit. For the SQ guys, it can be worthwhile.
Home audio fanatics love the Kasa Kable because in the HT world, it is a very cheap alternative, folks spend over $1500 on a set of speaker cables (thats is 8ft long!) so the $2/ft looks steep compared to the 16 gauge at 0.20/ft, but if the same material is used in our $2 as the $1500 cable.........