When it comes to deciding which of these two movies is better, I would have to say they are equally matched... it just depends on the mood you're in. If you want to have some fun and laugh while people are being slaughtered, watch House of 1000 Corpses (BTW: while it was released in 2003, the first trailer can be found on The Crow - at least on the VHS, though I'm not sure of the DVD). However, if you want a gritty, relentless, not-often-funny, 70s-styled exploitation film, watch The Devil's Rejects (though it is not as violent or shocking as some of the 70s cinema I've seen). Also, if you like Sig Haig's nutsack watch DR. If you want to find out more about Dr. Satan, wait for Rob Zombie's animated feature, The Haunted World of El Superbeasto, based on a comic book he wrote which contained the character (if done like the comic, it could become my new favorite anime).