Augustinus Bader The Vitamin C Serum vs COSRX The 6 Peptide Skin Booster Serum
Augustinus Bader The Vitamin C Serum scores 8.7/9.8 and COSRX The 6 Peptide Skin Booster Serum scores 8.5/9.8 — a near-tie where your skin type decides the winner.
Head to head
The Vitamin C Serum
The 6 Peptide Skin Booster Serum
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
28% overlapOnly in Augustinus Bader The Vitamin C Serum
22 unique
Shared ingredients
11 in common
Only in COSRX The 6 Peptide Skin Booster Serum
29 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 Augustinus Bader The Vitamin C Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
Augustinus Bader The Vitamin C Serum brings Ascorbyl Glucoside, Niacinamide, and Tocopheryl Acetate 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
Augustinus Bader The Vitamin C Serum is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Anyone who prefers clean, well-vetted formulations
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
Value comparison
At luxury pricing with a score of 8.7, Augustinus Bader The Vitamin C Serum delivers strong value. COSRX The 6 Peptide Skin Booster Serum sits at the mid-range level with a 8.5 score — the extra cost doesn't translate to better scores here.
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: Augustinus Bader The Vitamin C Serum or COSRX The 6 Peptide Skin Booster Serum?
Based on ingredient analysis, Augustinus Bader The Vitamin C Serum scores higher overall. See the full score breakdown above for details on each attribute.
Do Augustinus Bader The Vitamin C Serum and COSRX The 6 Peptide Skin Booster Serum share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between Augustinus Bader The Vitamin C Serum and COSRX The 6 Peptide Skin Booster Serum?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.