Is it worth it?

The Ordinary Azelaic Acid Suspension 10% vs Naturium Azelaic Topical Acid 10%

Cheaper
The OrdinaryAzelaic Acid Suspension 10%Treatment
$8.991.7 oz · $5.29/oz
azelaic acid
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Pricier
NaturiumAzelaic Topical Acid 10%Treatment
$20.001 oz · $20.00/oz
azelaic acidniacinamide
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The verdict

Paying $11.01 more for Naturium buys you niacinamide.

Naturium Azelaic Topical Acid 10% adds niacinamide (moderate evidence) that The Ordinary Azelaic Acid Suspension 10% doesn't have. On consumer consensus, The Ordinary Azelaic Acid Suspension 10% holds 4.3★ across 19,800 reviews vs Naturium Azelaic Topical Acid 10%'s 4.4★ across 5,600 reviews. The extra $11.01 for Naturium Azelaic Topical Acid 10% is defensible for the added niacinamide.

Not medical advice — consult a dermatologist. Conditions are self-declared and never diagnosed by this app.