What’s the difference between a $12/gal can of paint and a $25/gal can of paint?
Pricier paints tend to be of a higher quality. Often there is less water per can in the pricier paints and more heavy solids such as titanium. Additionally, the resins used in pricier paints tend to be of a higher quality as well. All of this means that a more expensive can of paint will probably last longer and hold a richer, deeper color for a longer period of time.