The distinguishing factor between smoking and vaping is that while vaping can deliver nicotine through the considerably less harmless process of heating a liquid, smoking delivers nicotine by burning tobacco, which can result in smoking-related ailments. The two are as different as day and night.

In contrast to vapor, the smell of smoke permeates the room for a long time. Non-smokers and vapers can detect the cigarette smell in a closed space for hours after smoking a cigarette. But cigarette smokers may not be able to do so.

Although vapor clouds may be larger and disperse more slowly, being visible in a room for a long period, the smell will be considerably more pleasant and go away much more quickly.

Numerous compounds in cigarette smoke are proven carcinogens, and many more are dangerous to breathe in. Contrarily, everything found in e-liquid, as well as its vapor, is safe to ingest.