What's the difference between a interior designer and an interior decorator besides the degree?
In simple words, if a customer needs a study table, an interior designer would look at what height the table has to be placed, and how much area is needed for the chair for easy movement at the time of studying, at what level the draw has to be placed so you can access it easily, what should be the rack size and strength to hold the average sized books, till what height of the book shelf can be reached by an average height person without having to stretch to reach too far. They also look at what material has to be used for the usage, what colors to choose and the most durable design that can add to the aesthetic beauty to the study room. They also need to consider if the chosen wood would withstand the length and breadth of the wood plank used in every part without causing bending issues. Basically, it includes understanding of the material+design+functionality+use case. Technical knowledge is a very important aspect of an interior designer.
On the other hand, an interior decorator would mostly look at the beautification part of the installation. On what is the trending design, what are the latest color combinations/patterns available, how to design the same study table matching to the architecture in the rest of the home, etc. Creativity is required more in the decorator as compared to a designer.
In short, interior designers may decorate, but decorators do not design.