Heres one-the Texas Chainsaw Family vs. The Hills Have Eyes clan!
This is tuff. But I think the Texans would win.They got wheels,,,,and chainsaws,of course!
They've both got their strong suits - Sawyer family has the vast technological advantage plus something of a strategic advantage, but Jupiter's clan is much more savage and instinctive...
I think once if got down to it Chop Top or Hitchhiker could hold their own against Mars and Pluto for a long enough time for Leatherface to finish Jupiter, and then be able to get Jupe's clan off his brothers' backs. Still, that is mostly provided Jupiter wouldn't overpower Leather... And who knows what would happen if they killed grampa!
You said just about what I was going to say on this battle, Brutality strikes fear which renders rational thinking weak, Yet strategy and intellect means you may have the ability to outsmart the Nerdy and there for only intelligent one in the group off Drinking, Shagging, smoking, college kids you tourment.