What are the differences between joint compound and plaster of Paris, and which one is more suitable for repairing drywall?

Joint compound and plaster of Paris are both used for repairing drywall, but they have different properties. Joint compound is a smooth, easy-to-sand material that is commonly used for finishing drywall seams and covering imperfections. Plaster of Paris, on the other hand, is a harder material that sets quickly and is often used for creating molds or sculptures.

For repairing drywall, joint compound is generally more suitable as it is specifically designed for this purpose and is easier to work with for most repairs. Plaster of Paris may be used for more specialized repairs or for creating decorative finishes, but for typical drywall repairs, joint compound is the preferred choice.