Comparison

Hydrochloric Acid with Pepsin and Betaine HCl Hydrochloric Acid with Pepsin

Hydrochloric Acid with Pepsin (Swanson Premium Brand) lists 2 distinct ingredients and Betaine HCl Hydrochloric Acid with Pepsin (Swanson) 2 (rows of one ingredient counted once); 2 are on both labels. On the site's similarity measure, which compares ingredient lists (1 for the same list, rarer ingredients counting for more; amounts are not part of it), the two formulas score 1.00: the same ingredients, at the amounts in the table below.

Amount per serving (and % of the Daily Value)
Ingredient	Hydrochloric Acid with Pepsin	Betaine HCl Hydrochloric Acid with Pepsin
Betaine Hydrochloride	325 mg	325 mg
Pepsin	82 mg	82 mg

Amounts are per serving as DSLD gives them: Hydrochloric Acid with Pepsin, 1 capsule; Betaine HCl Hydrochloric Acid with Pepsin, 1 capsule. Current labels entered April 2018 and February 2019. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own

Hydrochloric Acid with PepsinSwanson Premium Brand: every row against all products listing it
Betaine HCl Hydrochloric Acid with PepsinSwanson: every row against all products listing it