this is kind of an unanswerable question as they are only as good as they are designed and made and both ideas have the potential to be legendary if done right and unplayable garbage if done wrong. I would throw 2 small prototypes together and see how you feel about them(and maybe how other people feel about them as well) and go from there.

I have to say looking at your 2 still images the Russian roulette wins hands down, It has a great creepy vibe