Where innisfree Retinol Cica Ampoule really shines is hydration efficacy, scoring 9.2 compared to Summer Fridays Midnight Ritual Retinol Renewal Serum's 7.9. With Butylene Glycol, Propanediol, and Glycerin in its top ingredients, innisfree Retinol Cica Ampoule delivers stronger moisture-binding capability.
Active Ingredient Strength is another area of separation. innisfree Retinol Cica Ampoule scores 6.4 here versus 5.9 for Summer Fridays Midnight Ritual Retinol Renewal Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
innisfree Retinol Cica Ampoule brings Niacinamide, Tocopherol, and Retinol as actives, while summer Fridays Midnight Ritual Retinol Renewal Serum relies on Retinyl Linoleate, Retinol, and Centella Asiatica Extract. Both approaches have merit, but the positioning and supporting ingredients make the difference.
At budget pricing with a score of 8.7, innisfree Retinol Cica Ampoule delivers strong value. Summer Fridays Midnight Ritual Retinol Renewal Serum sits at the premium level with a 8.2 score — the extra cost doesn't translate to better scores here.