Safety Note: Products containing active ingredients like retinoids, vitamin C, or exfoliating acids may cause increased sun sensitivity. Always perform a patch test before first use, and apply SPF daily when using these products.
These recommendations are not medical advice. Consult a dermatologist for persistent skin concerns.
These two brands share the same premium price tag. That’s where the similarities end. Sunday Riley wraps clinical actives in botanicals and textures you’ll enjoy using. Peter Thomas Roth cranks active doses to the max and cuts everything else. Both deliver. Your preference drives the choice.
Skip the brand loyalty trap. Better strategy? Mix and match. Buy based on what active your skin needs, not whose name is on the bottle. Understanding each brand’s strengths makes smarter shopping.
Bottom line: Sunday Riley excels at gentle exfoliation (Good Genes) and retinoids that won’t wreck sensitive skin (Luna). Peter Thomas Roth wins on value for clinical-strength formulas (Potent-C, Retinol Fusion). Pick products based on your skin’s actual needs instead of sticking to one brand.
Brand Philosophies
Sunday Riley: Built by a biochemist focused on formulation tech. The brand stacks stable delivery systems with botanical ingredients alongside clinical actives. You get thick textures, sophisticated scents, beautiful packaging. The message? “Clinical results, spa experience.”
Peter Thomas Roth: Created by an acne sufferer tired of products that didn’t work. PTR packs in the strongest active levels that’ll remain stable and pass safety checks. Simple formulas. Zero fluff. The message? “Clinical results at clinical prices.”
Both approaches deliver. Comes down to whether you want the ritual or just want your skin fixed.
Head-to-Head Comparisons
Exfoliating Acids: Good Genes vs FIRMx Peeling Gel
Sunday Riley Good Genes All-In-One Lactic Acid Treatment
Sunday Riley Good Genes costs $72.25 for 1 oz. Uses lactic acid, an AHA that scrubs off dead cells while adding moisture. Contains licorice root for brightness and lemongrass for clarity. Light serum that absorbs quick.
Lactic acid molecules are larger than glycolic, so they penetrate slower. Result? Less chance of irritation. Works for sensitive types who freak out with stronger peels.
Peter Thomas Roth FIRMx Peeling Gel runs $48 for 3.4 oz. Different method entirely. Physical scrubbing plus glycolic and salicylic acids. As you rub it in, the gel clumps up with your dead skin. Visual proof it’s working.
Pure chemical exfoliation? Pick Good Genes. Combo chemical-physical at lower cost? Go FIRMx. Many people just switch back and forth.
Vitamin C: C.E.O. vs Potent-C
Peter Thomas Roth Potent-C Power Serum
Sunday Riley C.E.O. 15% Vitamin C Brightening Serum
Both rely on THD Ascorbate (tetrahexyldecyl ascorbate). That’s a stable vitamin C version that penetrates without oxidizing and turning your product orange like L-ascorbic acid. What differs? Concentration and texture.
Peter Thomas Roth Potent-C costs $95 for 1 oz. Delivers 20% THD Ascorbate in water serum. Includes ferulic acid and vitamin E for extra punch. Air-tight pump blocks oxidation. Your high-power option.
Sunday Riley C.E.O. costs $50 for 1 oz. Gives you 15% THD Ascorbate in cream-serum hybrid. Includes turmeric and ginger. Thicker feel, way more hydration. Your elegant option.
Want max brightening strength? Go Potent-C. Got sensitive or dry skin needing vitamin C with hydration? Go C.E.O.
Retinoids: Luna vs Retinol Fusion PM
Peter Thomas Roth Retinol Fusion PM
Sunday Riley Luna Sleeping Night Oil
Delivery system matters with retinoids. Pure retinol works fast but stings. Retinol esters feel gentle but work slower. Your skin decides which path you take.
Peter Thomas Roth Retinol Fusion PM runs $65 for 1 oz. Packs 1.5% pure retinol into lightweight serum. Buffered with squalane plus vitamins C and E. Clinical strength that’ll burn during adjustment phase but shows real visible changes.
Sunday Riley Luna costs $55 for 1 oz. Uses trans-retinol ester suspended in face oil. Adds blue tansy and German chamomile. Retinol ester can’t match pure retinol’s strength but feels way nicer. Oil base adds serious hydration while the active works.
Want aggressive anti-aging and can tolerate some burn? Retinol Fusion PM offers better bang for buck. Got sensitive skin or prioritize comfort? Luna’s gentle route justifies the extra cost.
| Spec | Sunday Riley Good Genes All-In-One Lactic Acid Treatment $80.75-$85.00as of Oct 11, 2026 9.2 | Peter Thomas Roth Potent-C Power Serum $90.25-$95.00as of Oct 11, 2026 8.9 | Sunday Riley C.E.O. 15% Vitamin C Brightening Serum $38.00-$40.00as of Oct 11, 2026 8.7 | Peter Thomas Roth Retinol Fusion PM $61.75-$65.00as of Oct 11, 2026 8.8 | Sunday Riley Luna Sleeping Night Oil $52.25-$55.00as of Oct 11, 2026 8.6 |
|---|---|---|---|---|---|
| Key Active | Lactic Acid | THD Ascorbate (20%) | THD Ascorbate (15%) | Retinol (1.5%) | Trans-Retinol Ester |
| Size | 1 oz / 30ml | 1 oz / 30ml | 1 oz / 30ml | 1 oz / 30ml | 1 oz / 30ml |
| Skin Type | All skin types | All skin types | — | Normal to oily | — |
| Usage | AM/PM | — | AM | PM only | PM only |
| Formula | Serum | — | — | — | — |
| Vegan | Yes | — | — | — | — |
| Rating | 9.2 | 8.9 | 8.7 | 8.8 | 8.6 |
Prices change daily — tap Check Price for the current Amazon price.
Prices change daily — tap Check Price for the current Amazon price.
Which Brand Suits Your Skin Type?
Oily/Acne-Prone Skin: Peter Thomas Roth specializes in lightweight water formulas that sink in without residue. Zero added oil. FIRMx Peeling Gel and Potent-C excel here. Avoid Sunday Riley Luna — it’s oil-based. Skip the heavy cream formulas too.
Dry Skin: Sunday Riley’s richer formulas add moisture while treating. Good Genes combines lactic acid exfoliation with hydration. Luna delivers retinoid power without sucking out moisture. C.E.O.’s cream-serum hybrid moisturizes.
Sensitive Skin: Sunday Riley layers in botanical buffers to reduce irritation. Good Genes picks lactic acid over harsher glycolic. Luna uses retinol ester to dodge the brutal adjustment phase. Start any new active slowly regardless of brand.
Combination Skin: Mix brands without worry. Apply PTR’s light formulas where you’re shiny. Use Sunday Riley’s thick textures where you’re flaky. Both brands work fine for combo types.
Value Analysis
Best Value Overall: Peter Thomas Roth Retinol Fusion PM costs $65 for 1.5% clinical-strength retinol. Competitors typically charge $100+ for this concentration.
Best Value Exfoliator: Sunday Riley Good Genes runs $72.25 for lactic acid formulated for sensitive types. Compare that to professional lactic peels — way pricier per session.
Best Value Vitamin C: Peter Thomas Roth Potent-C costs $95 for 20% THD Ascorbate plus ferulic acid. Similar formula from SkinCeuticals C E Ferulic? That’s $182.
Least Value: Sunday Riley Luna at $55 for trans-retinol ester. Gentle feel is appealing, but retinol ester remains the weakest retinoid type. PTR Retinol Fusion gives you clinical-strength retinol for just $65.
FAQs
Can I use products from both brands together? Absolutely. Plenty of routines successfully blend Sunday Riley with Peter Thomas Roth. Key rule? Don’t pile too many actives into one session. Rotate nights for retinoids versus acids.
Which brand is better for beginners? Sunday Riley formulates gentler, making it friendlier for newbies. Start Good Genes 2-3 nights per week. Layer in Luna after your skin adapts. Peter Thomas Roth’s high concentrations demand slower, more cautious introduction.
Are these brands cruelty-free? Both brands claim cruelty-free status and avoid animal testing. Sunday Riley leans mostly vegan. Peter Thomas Roth changes product to product. Double-check individual listings for vegan confirmation.
How long until I see results? Vitamin C needs 4-6 weeks before you’ll notice brightening. Retinoids require 8-12 weeks for smoother texture. Exfoliating acids typically show changes within 1-2 weeks. Consistency beats brand choice every time.
Bottom Line
Both brands work. Both use premium actives. Your decision comes down to what you value.
Pick Sunday Riley if you want: gentle formulas that work, thick textures, botanical ingredients, and skincare that feels nice to use. Start with Good Genes to exfoliate or Luna for beginner-friendly retinoids.
Pick Peter Thomas Roth if you want: strongest possible clinical actives, no-nonsense formulas, best value per concentration level, and results without caring about ritual. Start with Potent-C for vitamin C or Retinol Fusion PM for anti-aging.
Smartest strategy? Cherry-pick winners from both. Go Sunday Riley when you need gentle. Go Peter Thomas Roth when you need powerful. Your skin responds to the right actives in the right formulas. It doesn’t care whose logo is on the bottle.