COSRX The 6 Peptide Skin Booster Serum vs Paula's Choice Clinical Niacinamide 20% Treatment
COSRX The 6 Peptide Skin Booster Serum scores 8.5/9.8 and Paula's Choice Clinical Niacinamide 20% Treatment scores 8.7/9.8 — a near-tie where your skin type decides the winner.
Head to head
The 6 Peptide Skin Booster Serum
Clinical Niacinamide 20% Treatment
Score comparison
These two are neck and neck — just 0.2 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
COSRX WINSIrritation Risk
TIEActive Ingredient Strength
TIEIngredient Transparency
COSRX WINSFormulation Safety
TIEIngredient face-off
20% overlapOnly in COSRX The 6 Peptide Skin Booster Serum
32 unique
Shared ingredients
8 in common
Only in Paula's Choice Clinical Niacinamide 20% Treatment
15 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.
Ingredient Transparency is another area of separation. COSRX The 6 Peptide Skin Booster Serum scores 8.8 here versus 8.5 for Paula's Choice Clinical Niacinamide 20% Treatment. That difference comes down to how each formula is built — the ingredient list tells the story.
Paula's Choice Clinical Niacinamide 20% Treatment brings Niacinamide, Acetyl Glucosamine, and Ascorbyl Glucoside as actives, while cOSRX The 6 Peptide Skin Booster Serum relies on Niacinamide, Acetyl Hexapeptide-8, and Dipeptide Diaminobutyroyl Benzylamide Diacetate. 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
Paula's Choice Clinical Niacinamide 20% Treatment is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Anyone who prefers clean, well-vetted formulations
Value comparison
Both sit in the mid-range bracket, so value comes down to formulation quality. Paula's Choice Clinical Niacinamide 20% Treatment gets the nod here with its 8.7 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 Paula's Choice Clinical Niacinamide 20% Treatment?
Based on ingredient analysis, Paula's Choice Clinical Niacinamide 20% Treatment scores higher overall. See the full score breakdown above for details on each attribute.
Do COSRX The 6 Peptide Skin Booster Serum and Paula's Choice Clinical Niacinamide 20% Treatment 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 Paula's Choice Clinical Niacinamide 20% Treatment?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.