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COSRX BHA Blackhead Power Liquid vs Differin Differin Adapalene Gel 0.1%
COSRX BHA Blackhead Power Liquid and Differin Differin Adapalene Gel 0.1% are both treatments — both sit in the same category. On evidence, Differin Differin Adapalene Gel 0.1% grades higher — C, 69/100 versus D, 49/100. Differin Differin Adapalene Gel 0.1% costs $10 less (40% cheaper). That makes Differin Differin Adapalene Gel 0.1% the stronger pick on both efficacy and price.
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Grade, key actives, and price.
How we grade
Both products are graded A–F on the same standard: the active, its published effective concentration, and the study behind it — never marketing. A cheaper product can out-grade a pricier one. See the full methodology. Buy links are affiliate links; we may earn a small commission at no cost to you, and it never changes a grade.
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Get the appBased on published concentration thresholds and formulation science. Our algorithm predicts likely efficacy — it does not test the product. Individual results vary. Not evaluated by the FDA. Comparisons are based on graded efficacy, shared actives, and published dosing — not side-by-side clinical testing; textures and tolerability still differ.