There is a significant difference between Mr. Fog and Mr. Fog Elite flavors, primarily in terms of the type of Device used for ingestion. The Mr. Fog Vape Pen requires no maintenance and is capable of producing high quality, satisfying vapor whether used with E-Liquid or Dry Herb. Meanwhile, the Mr. Fog Pod is an advanced device that uses nicotine salts instead of propylene glycol and vegetable glycerin to create vapor; it requires refilling and offers richer flavor and longer-lasting enjoyment.