These two moisturisers take different paths to a similar destination. Both formulas include solid hydrating ingredients, and the overall scores reflect that — the gap here is genuinely slim.
Hydration Efficacy is another area of separation. Murad Retinol Youth Renewal Serum scores 9.8 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 murad Retinol Youth Renewal Serum relies on Retinol, Ceramide Np, and Solanum Lycopersicum (Tomato) Fruit 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.