What is the difference between drywall and plaster?

For structural differences, see Plastering and Drywall.

Plaster provides a stability, durability and sound proofing quality that drywall cannot.

Drywall however is faster to apply, cheaper to repair and less expensive in the shortrun.

Depending on the home and personal preference the classic style and durability of plaster or the versatility and cost-effectiveness of drywall could be right for you.