What is the primary concentration area for User Interface (UI) designers compared to User Experience (UX) designers?

The visual elements the user sees and touches, like buttons, icons, and screen layouts

The distinction between these two closely related digital roles is based on their focus. User Interface (UI) design is strictly concerned with the surface level of interaction—what the user visually perceives and physically manipulates on the screen, such as the arrangement of buttons, the appearance of icons, and the overall screen layouts. In contrast, User Experience (UX) design concentrates on the underlying structure, research, testing, and the resulting feeling a user has when navigating the entire product or service flow. The goal of UI is aesthetics and interactivity, while the goal of UX is research-driven usability and emotional response.