when compared to higher count strand strings of the same fiber, lsc strings are gonna be lighter (faster?), quieter (higher pitch), and have a different "feel" upon release.
does lower string weight contribute to faster arrow speeds? probably, but even if 5 or more fps were added (very very doubtful, perhaps more like 1 to 3 fps at the max for the average 45-60# stickbow) that's not gonna matter much at the distances most folks kill critters. no, speed doesn't kill - well placed sharp broadheads do.
is a "quieter" bow string beneficial to hunting? well sure, but what is "quiet"? imo, skinny strings produce higher pitched tones at lower volumes than fatter strings, for the same given bow and brace height. our human ears (and hands, bodies) perceive the louder low notes far better than the less volume high notes. so the skinny strings appear quieter. what does that mean to the game we hunt?
what "different feel" on release? i can only speak from my observations shooting and comparing a variety of same fiber lsc 8 strand strings to 14 strand strings - there's a better "stability" to the feel of the release with a smaller diameter bowstring. from the time the string slips off the bowhand fingers to the arrow clearing the riser, the bow and overall shot "feels better". dunno how to put it in any other words.