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OSB is a lot stronger. Particle board is a lot smoother. Which one is better depends on what you plan to do with it. If it will be structural I suggest OSB or plywood. Particle board is generally crappy. Views Â· View Upvotes.
1 OSB, another engineered sheet made of bigger pieces of wood, is stronger than either MDF or particleboard, although not as strong as plywood, and is commonly used for sheathing and roof decking. 2  MDF is made of fine wood fibers that have been pressed and glued together. 3  The resulting sheets are very smooth and flat.