Agave spirit is a broad term that refers to any alcoholic beverage made from the agave plant. There are many types of agave spirits, like mezcal, raicilla, and bacanora, which can be made from different species of agave in various regions of Mexico.
Tequila is a specific type of agave spirit made primarily from the blue Weber agave (Agave tequilana). It is produced in specific regions of Mexico, mainly in the state of Jalisco, and must follow strict regulations set by Mexican law.