COSRX The 6 Peptide Skin Booster Serum vs innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks
COSRX The 6 Peptide Skin Booster Serum scores 8.5/9.8 and innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks scores 8.5/9.8 — a near-tie where your skin type decides the winner.
Head to head
The 6 Peptide Skin Booster Serum
Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks
Score comparison
These two are neck and neck — just 0.0 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
COSRX WINSIrritation Risk
TIEActive Ingredient Strength
COSRX WINSIngredient Transparency
COSRX WINSFormulation Safety
TIEIngredient face-off
23% overlapOnly in COSRX The 6 Peptide Skin Booster Serum
31 unique
Shared ingredients
9 in common
Only in innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks
24 unique
Why these two are neck and neck
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.
Hydration Efficacy is another area of separation. COSRX The 6 Peptide Skin Booster Serum scores 9.2 here versus 8.8 for innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks. That difference comes down to how each formula is built — the ingredient list tells the story.
COSRX The 6 Peptide Skin Booster Serum brings Niacinamide, Acetyl Hexapeptide-8, and Dipeptide Diaminobutyroyl Benzylamide Diacetate as actives, while innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks relies on Lactobacillus Ferment Lysate, Gluconolactone, and Niacinamide. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
COSRX The 6 Peptide Skin Booster Serum is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Dipropylene Glycol
- Anyone who prefers clean, well-vetted formulations
innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Propanediol
- Anyone who prefers clean, well-vetted formulations
Value comparison
Both sit in the mid-range bracket, so value comes down to formulation quality. COSRX The 6 Peptide Skin Booster Serum gets the nod here with its 8.5 overall score — you're getting more for a similar outlay.
Our verdict
It's a close call — both products score within 0.3 points of each other. Your choice depends on your specific skin concerns.
Frequently asked questions
Which is better: COSRX The 6 Peptide Skin Booster Serum or innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks?
Based on ingredient analysis, COSRX The 6 Peptide Skin Booster Serum scores higher overall. See the full score breakdown above for details on each attribute.
Do COSRX The 6 Peptide Skin Booster Serum and innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between COSRX The 6 Peptide Skin Booster Serum and innisfree Rapid Vitamin C Brightening Serum for Dark Spots + Post-Breakout Marks?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.