Credenzas, buffets and sideboards are all large, decorative containers, outfitted with cabinet-like doors and large storage sections. They are often placed in dining rooms for storing and serving dishes and food. The difference Buffets are usually larger than sideboards, and sideboards are defined as having shorter legs. A credenza is similar to a buffet or sideboard, however historically they are defined by having no legs. In most cases the terms can be used interchangeably.