Both men appear to have killed people and both made music that was highly offensive to the mainstream culture. I'm not saying they are similar except in this way and yet we see here that people feel that Sid Vicious was cool, "Sid is God", while Sam is rejected. I'm wondering how much this has to do with the age of the people making these statements.
Many of the same statements made here about horrorcore were made about punk rock in the early days. The lack of musicality, bad singing, the fact that the bands had no or very limited musical abilities, the shocking appearance, drug abuse, and subject matter of the songs (they even had a song about abortion, Bodies). How many different chords are there in the entire Ramones catalog? From Wikipedia: Sex Pistols guitarist Steve Jones was asked why he, instead of Vicious, recorded the bass parts of Never Mind the Bollocks, Jones responded, "Sid was in a hospital with hepatitis so he couldn't really play, not that he could play anyway."
In other words, maybe Sam isn't cool yet because it is too close in time to the events in question. Sid was a disgusting drug addict with no musical talent and maybe he killed his wife with a knife. And yet he is considered cool because enough time has elapsed that people who were kids then still feel nostalgic about him despite his lack of musical ability, his undesirable lifestyle and tragic death.
Also, I think the Sex Pistols had better marketing. It is worth remembering that the band was formed as a marketing concept not a political statement.
See
http://en.wikipedia.org/wiki/Malcolm_McLaren
Sam just has our buddy Drama and Underground Nation promoting his stuff.
