Difference between heated tobacco products and e cigarettes PMI Philip Morris International Heated Tobacco Products, Cigarettes, and E Cigarettes: What's the Difference PMI Science About E Cigarettes (Vapes) Smoking and Tobacco Use CDC Toki Let's be real, what's the difference between vaping versus smoking cigarettes? We know that vaping contains no tobacco and far less chemicals than cigarettes but the keyword here is 'less'. Vaping vs. smoking: what are the differences? Uniprix Burning or Vaporizing Anything Causes Particulate Matter (PM 2.5) American Nonsmokers' Rights Foundation no smoke.org