Sourdough bread will have more sourness than one made with 100% commercial yeast due to the acids created by natural fermentation.
Sourdough isn’t super sour in the traditional sense—it’s not sour like taking a bit of a lemon. But it does have tanginess which is the byproduct of lactic acid fermentation. Sourdough bread will have more sourness than one made with 100% commercial yeast due to the acids created by natural fermentation.