Vinyl spackling and joint compound are both used to fill holes and imperfections in drywall, but they differ in composition, durability, and best uses. Vinyl spackling is a pre-mixed, latex-based product that remains somewhat flexible when dry, making it ideal for small holes and cracks that may expand or contract slightly. It doesn't shrink much, dries quickly (often within hours), and requires minimal sanding. However, it's not as hard or durable as joint compound and can crack if applied too thickly. Joint compound, also called "mud," is a gypsum-based powder that you mix with water. It's harder and more durable when fully cured, making it better for larger repairs and final finishing coats before painting. Joint compound shrinks as it dries, so larger holes typically need multiple coats. It sands more easily than vinyl spackling and provides a smoother final surface. For small nail holes and minor imperfections, vinyl spackling is the faster, easier choice. For substantial damage, multiple-coat finishing work, or situations where durability matters, joint compound is superior. Some professionals use both: spackling for small touch-ups and joint compound for more serious repairs and taping over drywall seams.