all i hear now a days is to use a whisker or a drop/fall away.....

will this actually help accuracy of a shooter??take away human error and assume bow is fine tuned...will this shoot better groups than a two prong style rest??? if so, why?? i ask because i shoot the two prong and everyone i talk to uses a whisker or drop away, but before i choose one or the other i want to know based on your guys experience or knowledge in this subject is it ACTUALLY better???

thanks,
Josh