Where StriVectin Super-C Retinol Brighten & Correct Vitamin C Serum really shines is active ingredient strength, scoring 9.7 compared to Sunday Riley B3 Nice 10% Niacinamide Serum's 7.6. Its formula features Sodium Ascorbyl Phosphate, Ascorbyl Glucoside, and Ascorbic Acid in high positions, signalling meaningful concentrations.
Hydration Efficacy is another area of separation. StriVectin Super-C Retinol Brighten & Correct Vitamin C Serum scores 5.8 here versus 5.1 for Sunday Riley B3 Nice 10% Niacinamide Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
StriVectin Super-C Retinol Brighten & Correct Vitamin C Serum brings Sodium Ascorbyl Phosphate, Ascorbyl Glucoside, and Ascorbic Acid as actives, while sunday Riley B3 Nice 10% Niacinamide Serum relies on Niacinamide, Resveratrol, and Asiaticoside. 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. StriVectin Super-C Retinol Brighten & Correct Vitamin C Serum gets the nod here with its 9.2 overall score — you're getting more for a similar outlay.