Monsters or serial killers?

A little compare and contrast project inspired by The Murderer is Still with Us and the question over what else to call its killer - English and Italian language wikipedia entries on the same topic and Italian multiple murderers:

http://en.wikipedia.org/wiki/Serial_killer

One point made here is that "Serial killer entered the popular vernacular in large part due to the well-publicized crimes of Ted Bundy and David Berkowitz in the middle years of that decade." - i.e. after the main giallo boom of the early 1970s.

http://en.wikipedia.org/wiki/Pietro_Pacciani

http://en.wikipedia.org/wiki/Leonarda_Cianciulli

http://it.wikipedia.org/wiki/Serial_killer

http://it.wikipedia.org/wiki/Categoria:Assassini_seriali

http://it.wikipedia.org/wiki/Pietro_Pacciani

http://it.wikipedia.org/wiki/Leonarda_Cianciulli