What are the differences between MDF and hardboard, and which one would be more suitable for my project?

MDF (medium-density fiberboard) is made from wood fibers bonded together with resin, while hardboard is made from compressed wood fibers. MDF is denser and smoother, making it better for painting and finishing, while hardboard is more durable and impact-resistant. For a project requiring a smooth finish, MDF would be more suitable, while hardboard would be better for projects needing durability.