What's the difference between a dewy and a luminous foundation?

Reviewers tend to use the terms interchangeably, but dewy generally refers to a wet, hydrated finish that mimics moisturized skin, while luminous emphasizes a soft glow or radiance. Both sit on the opposite end of the spectrum from matte and typically suit normal-to-dry skin types better than oily complexions, though several formulas in this category include blurring or pore-minimizing claims aimed at combination skin.