Other than marketing what is the chemical difference between good expensive vodka and the cheapest 80 proof vodka you can buy?

Great question! Marketing is a large factor in the price of a liquor. Let me give you an example: Smirnoff Vodka is triple distilled and Platinum 7 Vodka is distilled seven times. Smirnoff has a huge marketing campaign. Platinum 7 has no marketing campaign but is much smoother and costs a few dollars less than Smirnoff. If you're looking for premium liquor without the expensive price tag, go to www.theliquorsaver.com