difference between user experience and user interface

A good web designer or developer should a deeper understanding of UX and UI, the overall performance of a website depends on these two things. The user experience of a website seeks to check the interactivity, as in how a user is able to navigate through the website back and forth without getting stack and also being able to find the vital information they seek or the vital information the site's owner wishes promote. In short, user experience is much centered on navigation and organization. 

The user interface of  website on the other hand focuses on it's graphical interactivity. The graphical interaction of a website is very essential as it gives a clearer perspective of information to the user. The user interface checks on quality of text , images, sliders etc.