Independent organizations who assess performances of cameras usually share the results that they get from tests of ISO performance (noise level), continuous shooting speed, sensor capacity. But one day when your camera stops working, facts that it has 50 megapixels, being able to take 100 frames of pictures, and its ability to take shiny photos of ISO12800 do not matter. If I am in a hurry, I prefer a Fiat that can move to a Ferrari with a flat tire.