Both are serums that protect the hair against heated tools and have UV filters to protect against color fade and humidity without ever weighing the hair down. The Finishing Serum delivers a lighter silky effect, excellent if blow dried into fine, thin hair as it will make the hair feel and look thicker. The Curl Revive delivers a weightier, cashmere effect to the hair so is ideal for all curl, wave and textured hair. It also works very well for thick, coarse Indian, Asian and chemically straightened hair. One can also cocktail these serums. For example, someone with extensions would use the Finishing Serum on the their thin, fine, natural hair and the Curl Revive on their extensions.