SAM or KRAMPUS or JACK or PUMPKINHEAD

Sam and Krampus. (Image Source: CodySchibi.com, buy print at CodySchibi.bigcartel.com):

Is this Sam, Krampus or Sampus? (Image Source: ChadSavage.com, buy print, t-shirt, sticker at RedBubble.com):

Krampus or Jack Skellington? (Image Source: charamath.tumblr.com, buy print at Etsy.com):

Which is Krampus, which is Pumpkinhead? (Image Source: iHorror.com and @CAVITYCOLORS):

Is this Sam or baby Pumpkinhead? (Image Source: iHorror.com):