I think that part of that "magic" is the fact that the f/1.4 is optically a better lens. Mechanically and in some other ways such as weather sealing, the f/2 has an advantage. However, to get the price point and size down while only giving up one stop of light and improving other things, they did make some sacrifices in the optics. The f/2 is not optically corrected, it relies on digital correction, but the f/1.4 is optically corrected. That doesn't mean you can't have a great lens that relies on digital correction. The 10-24mm is wonderful and that relies heavily on digital correction at the wide end. However, you don't expect a wide angle f/4 landscape lens to have that "magic" in the same sense that a fast "normal" lens might. Fuji hit a home run on the f/2 given the price, features, focus speed, etc, but optically they hit a grand slam with the f/1.4 version. That is where the consistency comes from in producing those "magic" images.