Where Drunk Elephant Protini Polypeptide Firming Refillable Moisturizer really shines is active ingredient strength, scoring 9.8 compared to Sunday Riley A+ High-Dose Retinoid Serum's 5.3. Its formula features Nymphaea Alba Root Extract, Copper Palmitoyl Heptapeptide-14, and Palmitoyl Tetrapeptide-7 in high positions, signalling meaningful concentrations.
Hydration Efficacy is another area of separation. Sunday Riley A+ High-Dose Retinoid Serum scores 7.5 here versus 7.0 for Drunk Elephant Protini Polypeptide Firming Refillable Moisturizer. That difference comes down to how each formula is built — the ingredient list tells the story.
Drunk Elephant Protini Polypeptide Firming Refillable Moisturizer brings Nymphaea Alba Root Extract, Copper Palmitoyl Heptapeptide-14, and Palmitoyl Tetrapeptide-7 as actives, while sunday Riley A+ High-Dose Retinoid Serum relies on Retinol, Ubiquinone, and Honey Extract. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Both sit in the premium bracket, so value comes down to formulation quality. Drunk Elephant Protini Polypeptide Firming Refillable Moisturizer gets the nod here with its 8.7 overall score — you're getting more for a similar outlay.