COSRX The 6 Peptide Skin Booster Serum vs SK-II R.N.A. Power Anti-Aging Cream
COSRX The 6 Peptide Skin Booster Serum scores 8.5/9.8 and SK-II R.N.A. Power Anti-Aging Cream scores 8.3/9.8 — a near-tie where your skin type decides the winner.
Head to head
The 6 Peptide Skin Booster Serum
R.N.A. Power Anti-Aging Cream
Score comparison
These two are neck and neck — just 0.2 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
SK-II WINSIrritation Risk
COSRX WINSActive Ingredient Strength
COSRX WINSIngredient Transparency
TIEFormulation Safety
COSRX WINSIngredient face-off
14% overlapOnly in COSRX The 6 Peptide Skin Booster Serum
34 unique
Only in SK-II R.N.A. Power Anti-Aging Cream
37 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 5.7 for SK-II R.N.A. Power Anti-Aging Cream. 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 sK-II R.N.A. Power Anti-Aging Cream relies on Galactomyces Ferment Filtrate, Niacinamide, and Tocopheryl Acetate. 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
SK-II R.N.A. Power Anti-Aging Cream 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 delivers strong value. SK-II R.N.A. Power Anti-Aging Cream sits at the luxury level with a 8.3 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: COSRX The 6 Peptide Skin Booster Serum or SK-II R.N.A. Power Anti-Aging Cream?
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 SK-II R.N.A. Power Anti-Aging Cream 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 SK-II R.N.A. Power Anti-Aging Cream?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.