User blog comment:EvilLamp/Category Suggestions/@comment-4708882-20160418212503/@comment-26884760-20160418213431

in fairness "spree killer" is just a very specific mass-murderer.. while a thrill-killer need not be a mass murderer at all.. even if they kill multiple people they are not necessary a mass murderer (unless they do so in one sitting or without any real "cool down").

They also tend to be egomaniacs and snuff-filmers, like Alan Yates (I keep bringing him up as he is pretty much the poster boy of thrill killers, at least in fiction).

a spree-killer by definition should really be restricted to the "rampage killer", who often seeks their own death in the process - they are a subset of both mass murderer and destroyer with a sprinkle of sucidal / nihilist.

a thrill-killer by definition should really be restricted to egotisical, sadistic (yet often cowardly) and opportunistic with a dash of snuff-filmer / attention-seeker mixed in.. but be wary of focusing too much on any one as they are all symptoms rather than the "end all" of what it is to be a "thrill killer".