FNAF obviously. I think they both benefit. Let's pretend Saw X opens to $20 million and FNAF $50 million. Had they both kept the same day to might have had Saw X opening to $15 million and FNAF $45 million.
I just saw a clip of this at Frightfest. A guy has 60 seconds to break his fingers or his eyes will be sucked out his head. Looks awesome, looked like one of the older Saw movies.