COSRX The 6 Peptide Skin Booster Serum vs Skinfix Target+ Brighten + Firm 15% Vitamin C Serum
Skinfix Target+ Brighten + Firm 15% Vitamin C Serum scores 9.2/9.8 vs COSRX The 6 Peptide Skin Booster Serum at 8.5/9.8. Skinfix Target+ Brighten + Firm 15% Vitamin C Serum wins for active ingredients.
Head to head
The 6 Peptide Skin Booster Serum
Target+ Brighten + Firm 15% Vitamin C Serum
Score comparison
Skinfix Target+ Brighten + Firm 15% Vitamin C Serum edges ahead, winning 3 of 5 attributes.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
COSRX WINSIrritation Risk
TIEActive Ingredient Strength
COSRX WINSIngredient Transparency
COSRX WINSFormulation Safety
TIEIngredient face-off
25% overlapOnly in COSRX The 6 Peptide Skin Booster Serum
30 unique
Shared ingredients
10 in common
Only in Skinfix Target+ Brighten + Firm 15% Vitamin C Serum
22 unique
Why Skinfix Target+ Brighten + Firm 15% Vitamin C Serum comes out ahead
Where Skinfix Target+ Brighten + Firm 15% Vitamin C Serum really shines is active ingredient strength, scoring 5.8 compared to COSRX The 6 Peptide Skin Booster Serum's 6.5. Its formula features Tetrahexyldecyl Ascorbate, Oligopeptide-2, and Hexapeptide-11 in high positions, signalling meaningful concentrations.
Hydration Efficacy is another area of separation. COSRX The 6 Peptide Skin Booster Serum scores 9.2 here versus 8.8 for Skinfix Target+ Brighten + Firm 15% Vitamin C Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
Skinfix Target+ Brighten + Firm 15% Vitamin C Serum brings Tetrahexyldecyl Ascorbate, Oligopeptide-2, and Hexapeptide-11 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
Skinfix Target+ Brighten + Firm 15% Vitamin C Serum 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
At mid-range pricing with a score of 8.5, COSRX The 6 Peptide Skin Booster Serum is a decent pick. Skinfix Target+ Brighten + Firm 15% Vitamin C Serum sits at the premium level with a 9.2 score — the higher investment pays off in formulation quality.
Our verdict
Skinfix Target+ Brighten + Firm 15% Vitamin C Serum edges ahead with a slightly stronger formulation, but COSRX The 6 Peptide Skin Booster Serum is still a solid pick.
Frequently asked questions
Which is better: COSRX The 6 Peptide Skin Booster Serum or Skinfix Target+ Brighten + Firm 15% Vitamin C Serum?
Based on ingredient analysis, Skinfix Target+ Brighten + Firm 15% Vitamin C Serum scores higher overall. See the full score breakdown above for details on each attribute.
Do COSRX The 6 Peptide Skin Booster Serum and Skinfix Target+ Brighten + Firm 15% Vitamin C 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 COSRX The 6 Peptide Skin Booster Serum and Skinfix Target+ Brighten + Firm 15% Vitamin C Serum?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.