Comparison

B-Stress Formula with Siberian Eleuthero and B-Stress Formula with Eleuthero

B-Stress Formula with Siberian Eleuthero (Nature's Way) lists 14 distinct ingredients and B-Stress Formula with Eleuthero (Nature's Way) 13 (rows of one ingredient counted once); 13 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 0.93.

Amount per serving (and % of the Daily Value)
IngredientB-Stress Formula with Siberian EleutheroB-Stress Formula with Eleuthero
Vitamin C500 mg (556%)250 mg (278%)
Vitamin B6110 mg (6471%)50 mg (2941%)
Vitamin B12100 mcg (4167%)50 mcg (2083%)
Niacin125 mg (781%)62.5 mg (391%)
Folate400 mcg333 mcg DFE (83%)
Pantothenic Acid (Vitamin B5)150 mg (3000%)75 mg (1500%)
Riboflavin50 mg (3846%)25 mg (1923%)
Thiamin50 mg (4167%)25 mg (2083%)
Biotin300 mcg (1000%)150 mcg (500%)
Choline50 mg (9%)25 mg (5%)
Inositol100 mg50 mg
Eleuthero250 mg125 mg
PABA50 mg25 mg
Chromium200 mcg (571%)

Amounts are per serving as DSLD gives them: B-Stress Formula with Siberian Eleuthero, 2 capsules; B-Stress Formula with Eleuthero, 1 capsule. Current labels entered December 2014 and April 2019. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own