Vapes and e-cigarettes are similar in that neither uses tobacco to deliver nicotine to the user. The primary difference between vapes and e-cigarettes is the way liquid nicotine is stored.
A vape (or vaporiser) has a tank with a heating element to heat e-liquid (liquid nicotine) to produce a vapor to ingest. For a vape to work, the user must refill the tank as needed.
On the other hand, e-cigarettes use disposable e-liquid containers. These containers are replaced, and the empty ones are disposed of. There is no container to refill in e-cigarettes.
Both vapes and e-cigarettes use an on-board battery which heats the e-liquid, turning it into vapor for inhalation.
Vapes and e-cigarettes can also be filled with liquid that doesn’t contain nicotine.