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IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores 9.0/9.8 and Sulwhasoo Overnight Vitalizing Mask scores 9.0/9.8 — a near-tie where your skin type decides the winner.
These two are neck and neck — just 0.0 points apart.
Scores last verified: June 2026
22 unique
48 unique
These two serums 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.
Active Ingredient Strength is another area of separation. IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores 7.0 here versus 4.9 for Sulwhasoo Overnight Vitalizing Mask. That difference comes down to how each formula is built — the ingredient list tells the story.
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening brings Ascorbic Acid, Gluconolactone, and Glutathione as actives, while sulwhasoo Overnight Vitalizing Mask relies on Camellia Sinensis Leaf Extract, Panax Ginseng Root Extract, and Ophiopogon Japonicus Root Extract. Both approaches have merit, but the positioning and supporting ingredients make the difference.
IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening is better if you have
Sulwhasoo Overnight Vitalizing Mask is better if you have
At premium pricing with a score of 9.0, IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening is a decent pick. Sulwhasoo Overnight Vitalizing Mask sits at the luxury level with a 9.0 score — the extra cost doesn't translate to better scores here.
It's a close call — both products score within 0.3 points of each other. Your choice depends on your specific skin concerns.
Based on ingredient analysis, IOPE Expert Vitamin C 25% Antioxidant Serum for Brightening scores higher overall. See the full score breakdown above for details on each attribute.
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.
Honest skincare intel. No jargon, no gatekeeping — just the ingredients decoded.
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© 2026 Gracie. All rights reserved. Data sourced from Open Beauty Facts (ODbL) and EU CosIng.