What is the difference between interior decoration and interior fit-out?

“Interior decoration mainly focuses on the visual and functional appearance of a space, including furniture, colours, fabrics, curtains, upholstery and decorative elements. Interior fit-out covers a wider range of construction and finishing works needed to complete the space, such as ceilings, flooring, MEP, joinery, partitions and painting. HKZ provides both interior decoration and fit-out solutions depending on the project scope.”