Many folks know that Tequila is a made from the Blue Agave plant; Mescals are made from the Agave but not just the blue ones, any mature Agave plant can be used to produce Mescal; Tequila is a form of Mescal. Today it’s a very commercial process while many Mescals are still made with traditional methods.
Juan Pablo Ballesteros discusses about how in the commercial tequila production process they cut the plant way before it’s mature, so they may need to add sugar or other flavors missing from the immature plants.
Nicholas Gilman mentions a few things about Tequila’s origin. It’s original name is “mezcal de tequila” and it was made in the town of Tequila; Mezcal is identified by the area where it is produced.