The main difference between DiamondGlow and HydraFacial is in the exfoliation. Using a diamond-tipped exfoliator, DiamondGlow resurfaces the skin so that the serums can efficiently penetrate the underlying tissue for optimal results. A HydraFacial is a gentle treatment that helps maintain healthy skin and keep it plump. The DiamondGlow facial is more of a corrective treatment that can target sensitive areas at a higher level.