I think phone cameras are a matter of preference and having owned the One X and now the One, I still think the One X was better for just pointing and shooting.. The One takes a more realistic clearer picture though it just takes a bit of messing about.
If you are indoors then the One is the perfect camera but outside the One X was a bit better. I suppose it all depends on where you take the most pictures.. I still wouldn't swap my One for any other phone on the market or coming out