Based on your comments, it appears that a mobile device that doesn't have picture and video quality "equal to or better" than the iPhone would be a deal breaker for you? If that's the case I would suggest you not buy the Note 2, because while I, and others, can give you our assessment that the two devices both have pros and cons, no one but you can determine if the image quality is to your liking.
Whether I think the image quality on the Note 2 is equal or better than the iPhone would only be my opinion. If you ask 10 people, each with their own biases and experiences, they will give you their opinion. In the end, to determine if the Note 2 meets your requirements you'll need to get your hands on one and determine for yourself. To me, the image quality is superb (see pics above taking at night in low light), but again that's my opinion. Your eye may be trained to see detail that I overlook, and so your idea of superb is much different than mine.
So take the time to visit a store, or contact a friend who may already own one, and take some shots yourself. That way you get an objective opinion based on what only you are looking for, and can decide from there. I wish you the best in your search.