Lumia 1020 has very slow shot-to-shot and start times. On iPhone 5 I can start the camera app and shoot 9 images in 10 seconds. Just did it. On 1020 you might get 3 shots of in the same time. But the key is the time to first shot. On iPhone 5, from off to first shot is roughly 2.5 seconds, and just .5 of a second or so for the second. 1020 takes 4-5 seconds for first shot, another 2-3 seconds for the second (based on my experiments in the store).
Since most people use their cameras to shoot pictures of cute cats or children, and then upload them to FB, I think the vast majority of people would prefer the fast and very good quality of the iPhone over the slow but excellent quality of 1020.
Since most people use their cameras to shoot pictures of cute cats or children, and then upload them to FB, I think the vast majority of people would prefer the fast and very good quality of the iPhone over the slow but excellent quality of 1020.