COSRX The Alpha-Arbutin 2 Discoloration Care Serum vs INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid scores 9.7/9.8 vs COSRX The Alpha-Arbutin 2 Discoloration Care Serum at 8.1/9.8. INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid wins for active ingredients.
Head to head
The Alpha-Arbutin 2 Discoloration Care Serum
Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid
Score comparison
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid takes this one, winning 1 of 5 attributes.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
COSRX WINSIrritation Risk
TIEActive Ingredient Strength
INNBEAUTY PROJECT WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
21% overlapOnly in COSRX The Alpha-Arbutin 2 Discoloration Care Serum
24 unique
Shared ingredients
9 in common
Only in INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid
33 unique
Why INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid comes out ahead
Where INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid really shines is active ingredient strength, scoring 9.8 compared to COSRX The Alpha-Arbutin 2 Discoloration Care Serum's 6.2. Its formula features Tetrahexyldecyl Ascorbate, Niacinamide, and Ascorbic Acid in high positions, signalling meaningful concentrations.
Hydration Efficacy is another area of separation. COSRX The Alpha-Arbutin 2 Discoloration Care Serum scores 7.3 here versus 6.3 for INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid. That difference comes down to how each formula is built — the ingredient list tells the story.
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid brings Tetrahexyldecyl Ascorbate, Niacinamide, and Ascorbic Acid as actives, while cOSRX The Alpha-Arbutin 2 Discoloration Care Serum relies on Niacinamide, Tranexamic Acid, and Acetyl Glucosamine. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
COSRX The Alpha-Arbutin 2 Discoloration Care Serum 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
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Targeting specific concerns like aging or uneven tone — Tetrahexyldecyl Ascorbate does the heavy lifting
- Anyone who prefers clean, well-vetted formulations
Value comparison
At mid-range pricing with a score of 8.1, COSRX The Alpha-Arbutin 2 Discoloration Care Serum is a decent pick. INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid sits at the premium level with a 9.7 score — the higher investment pays off in formulation quality.
Our verdict
INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid wins this comparison with a meaningfully stronger ingredient profile and overall score.
Frequently asked questions
Which is better: COSRX The Alpha-Arbutin 2 Discoloration Care Serum or INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid?
Based on ingredient analysis, INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid scores higher overall. See the full score breakdown above for details on each attribute.
Do COSRX The Alpha-Arbutin 2 Discoloration Care Serum and INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid 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 Alpha-Arbutin 2 Discoloration Care Serum and INNBEAUTY PROJECT Pro C Serum Brightening Solution with 15% Vitamin C + Ferulic Acid?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.