✶

Peter Thomas Roth FI… vs SK-II R.N.A. Power A… — Which Is Better? | Gracie

Products
Ingredients
Brands
K-Beauty
Blog
How We Score

Gracie
/Compare
/Peter Thomas Roth FIRMx Collagen Moisturizer
/vs
/SK-II R.N.A. Power Airy Milky Lotion

Peter Thomas Roth FIRMx Collagen Moisturizer vs SK-II R.N.A. Power Airy Milky Lotion

Peter Thomas Roth FIRMx Collagen Moisturizer scores 8.5/9.8 vs SK-II R.N.A. Power Airy Milky Lotion at 8.0/9.8. Peter Thomas Roth FIRMx Collagen Moisturizer wins for active ingredients.

Head to head

✶

Peter Thomas Roth

FIRMx Collagen Moisturizer

moisturiserpremium

8.5

Buy at Amazon

Compare

Best Moisturisers
Best Serums
Best Cleansers
Best SPF

Ingredients

Niacinamide
Retinol
Hyaluronic Acid
Salicylic Acid

K-Beauty

K-Beauty Hub
K-Beauty Moisturisers
K-Beauty Serums
K-Beauty Sunscreens

About

Methodology
About Us
All Brands
All Products

Gracie

Honest skincare intel. No jargon, no gatekeeping — just the ingredients decoded.

SK-II

R.N.A. Power Airy Milky Lotion

moisturiserluxury

8.0

Buy at Amazon

Score comparison

Peter Thomas Roth FIRMx Collagen Moisturizer edges ahead, winning 2 of 5 attributes.

Peter Thomas Roth wins 2

Tied 2

SK-II wins 1

9.0

Peter Thomas Roth

SK-II

Ingredient face-off

46% overlap

24Peter Thomas Roth

11Shared

23SK-II

Only in Peter Thomas Roth FIRMx Collagen Moisturizer

13 unique

Water/Aqua/Eau Collagen Caprylic/Capric Triglyceride Palmitoyl Tripeptide-1 Palmitoyl Tetrapeptide-7 Squalane Jojoba Esters Allantoin Dimethicone Crosspolymer Aminomethyl Propanol+3 more

Shared ingredients

11 in common

Glycerin Dimethicone Cetearyl Alcohol Niacinamide Sodium Hyaluronate Panthenol Glyceryl Stearate Peg-100 Stearate Tocopheryl Acetate Carbomer+1 more

Only in SK-II R.N.A. Power Airy Milky Lotion

12 unique

Water Isododecane Butylene Glycol Polysilicone-11 Hydrogenated Polydecene Trehalose Inositol Behenyl Alcohol Adenosine Sodium Hydroxide+2 more

Why Peter Thomas Roth FIRMx Collagen Moisturizer comes out ahead

Where Peter Thomas Roth FIRMx Collagen Moisturizer really shines is active ingredient strength, scoring 5.9 compared to SK-II R.N.A. Power Airy Milky Lotion's 4.2. Its formula features Collagen, Niacinamide, and Palmitoyl Tripeptide-1 in high positions, signalling meaningful concentrations.

Hydration Efficacy is another area of separation. Peter Thomas Roth FIRMx Collagen Moisturizer scores 9.1 here versus 8.3 for SK-II R.N.A. Power Airy Milky Lotion. That difference comes down to how each formula is built — the ingredient list tells the story.

Peter Thomas Roth FIRMx Collagen Moisturizer brings Collagen, Niacinamide, and Palmitoyl Tripeptide-1 as actives, while sK-II R.N.A. Power Airy Milky Lotion relies on Niacinamide, Adenosine, and Tocopheryl Acetate. Both approaches have merit, but the positioning and supporting ingredients make the difference.

Best for your skin type

Peter Thomas Roth FIRMx Collagen Moisturizer 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

SK-II R.N.A. Power Airy Milky Lotion 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 premium pricing with a score of 8.5, Peter Thomas Roth FIRMx Collagen Moisturizer delivers strong value. SK-II R.N.A. Power Airy Milky Lotion sits at the luxury level with a 8.0 score — the extra cost doesn't translate to better scores here.

Our verdict

✶ Our verdict

+0.5 lead

Peter Thomas Roth FIRMx Collagen Moisturizer edges ahead with a slightly stronger formulation, but SK-II R.N.A. Power Airy Milky Lotion is still a solid pick.

✶

8.5Peter Thomas Roth

8.0SK-II

Frequently asked questions

Which is better: Peter Thomas Roth FIRMx Collagen Moisturizer or SK-II R.N.A. Power Airy Milky Lotion?

Based on ingredient analysis, Peter Thomas Roth FIRMx Collagen Moisturizer scores higher overall. See the full score breakdown above for details on each attribute.

Do Peter Thomas Roth FIRMx Collagen Moisturizer and SK-II R.N.A. Power Airy Milky Lotion share ingredients?

Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.

What's the main difference between Peter Thomas Roth FIRMx Collagen Moisturizer and SK-II R.N.A. Power Airy Milky Lotion?

The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.

Full analysis: Peter Thomas Roth FIRMx Collagen Moisturizer→Full analysis: SK-II R.N.A. Power Airy Milky Lotion→

We may earn a commission from purchases made through our links, at no extra cost to you. This helps us keep Gracie free and independent.

Some links on this site are affiliate links. We may earn a commission from purchases made through our links, at no extra cost to you. This helps us keep Gracie free and independent.