Most people use the words interior designer and interior decorator interchangeably, but they are definitely not the same. Although they’re closely related, there are very distinct differences between the two. You decorate for holidays or for a new look. Decorators rely on using your current space with only minor modifications. They move around your furniture and arrange your artwork. Designers are more involved with functional changes, such as remodeling, construction, as well as furnishings and aesthetic selections.