The mechanisms to get the price breaks are roughly the same -- the state Department of Health Services would negotiate drug discounts from the industry and pharmacies on behalf of uninsured Californians. Each proposition is expected to cost the state roughly equivalent amounts of money to administer. But there the similarities stop. For one, Prop. 79 is backed by labor and consumer groups, while the pharmaceutical industry sponsored Prop. 78. Prop. 78 relies on the voluntary cooperation of drugmakers to negotiate discounts. In contrast, Prop. 79 threatens to ban manufacturers from selling drugs to the state's $4 billion Medi-Cal program...