The main differences between the two tools come down to flexibility, power, and popularity. Swing still sees lots of use in GUI creation, both because of its ease of use and its widespread employment across the industry. Creating complex interfaces is a breeze with either approach, though. Desktop applications come together more easily when you use FX, and the younger tool gains ground on its big sibling every year. Swing has a wider range of UI components compared to FX, but FX adds more all the time, so this difference might not be notable much longer. Likewise, JavaFX offers IDE support, but Swing’s IDE support is more mature and has more options for rapid deployment needs. On the flipside, FX offers consistent support for MVC, while Swing’s MVC support is not equal across all platforms.