COSRX The 6 Peptide Skin Booster Serum vs Paula's Choice 10% Azelaic Acid Booster for Redness Relief
COSRX The 6 Peptide Skin Booster Serum scores 8.5/9.8 and Paula's Choice 10% Azelaic Acid Booster for Redness Relief scores 8.4/9.8 — a near-tie where your skin type decides the winner.
Head to head
The 6 Peptide Skin Booster Serum
10% Azelaic Acid Booster for Redness Relief
Score comparison
These two are neck and neck — just 0.1 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
13% overlapOnly in COSRX The 6 Peptide Skin Booster Serum
35 unique
Only in Paula's Choice 10% Azelaic Acid Booster for Redness Relief
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.
Active Ingredient Strength is another area of separation. COSRX The 6 Peptide Skin Booster Serum scores 6.5 here versus 5.9 for Paula's Choice 10% Azelaic Acid Booster for Redness Relief. 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 paula's Choice 10% Azelaic Acid Booster for Redness Relief relies on Azelaic Acid, Salicylic Acid, and Adenosine. 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 10% Azelaic Acid Booster for Redness Relief is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Glycerin
- 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 Paula's Choice 10% Azelaic Acid Booster for Redness Relief?
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 Paula's Choice 10% Azelaic Acid Booster for Redness Relief 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 10% Azelaic Acid Booster for Redness Relief?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.