Comparison

B-Complex Fortified With Vitamin C and Cal-Mag With B-Complex & Vitamin C

B-Complex Fortified With Vitamin C (Sunshine Naturals) lists 15 distinct ingredients and Cal-Mag With B-Complex & Vitamin C (NOW) 14 (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 0.78.

Amount per serving (and % of the Daily Value)
IngredientB-Complex Fortified With Vitamin CCal-Mag With B-Complex & Vitamin C
Vitamin C150 mg (167%)120 mg (133%)
Calcium170 mg (13%)1,000 mg (77%)
Vitamin B62.5 mg (147%)5 mg (294%)
Magnesium4 mg (under 1%)500 mg (119%)
Vitamin B122.5 mcg (104%)20 mcg (833%)
Niacin50 mg (313%)40 mg (250%)
Folate800 mcg800 mcg
Pantothenic Acid (Vitamin B5)7 mg (140%)20 mg (400%)
Riboflavin6 mg (462%)5 mg (385%)
Thiamin12.5 mg (1042%)10 mg (833%)
Choline2.5 mg (under 1%)20 mg (4%)
Inositol0.1 mg20 mg
PABA2 mg10 mg
Zinc2 mg (18%)
Biotin300 mcg (1000%)
Rutin20 mg

Amounts are per serving as DSLD gives them: B-Complex Fortified With Vitamin C, 1 tablet; Cal-Mag With B-Complex & Vitamin C, 2 tablets. Current labels entered August 2015 and May 2015. Percentages of the Daily Value from 21 CFR 101.9. Source: NIH ODS Dietary Supplement Label Database.

Each product on its own