The major difference between an interior designer and an interior decorator is their formal training. Interior designers are professional and require formal qualifications on the contrary decorators don't need to pass any examination. Interior designers work to design and renovate the rooms and an interior decorator decides the color scheme, type of furniture and alignment of paintings and antiques. Designers work closely with contractors and builders to give the exact shape asked by the client and decorators furniture makers and other industrial workers. The prominent difference between an interior designer and an interior decorator is the way they work and methods they opt to renovate and decorate a house.
Before hiring an interior designer or decorator you have to understand some specific things such as type of building like multi-family buildings, single family apartments and many more. If you want to add a wall to your home, change the water fittings or to remove a door or window then you should contact an interior designer but if you wish to decide a wallpaper, paint or type of furniture for your house then an interior decorator should be your choice. They both work to make your house beautiful and innovative but their professions are quite different which you should understand before hiring them.