Both songs are great but, in an instance such as this you need to find something that makes one of them stand apart. NR is very unique. I'm willing to bet that all of you (that is any of you that may have been around at the time that the album came out) thought "wtf am I listening too..." the first time you heard the song but, there was something that intrigued you about it and demanded that you continue to listen to it.
SS doesn't have this special element to it. Therefore, SS must go.