Only brandy produced in the Armagnac region of southwestern France can carry the name Armagnac. Alongside Cognac, it is one of the world's most recognized styles of brandy, though the differences between the two extend far beyond geography and name.
Where Cognac is distilled twice in pot stills, Armagnac is typically distilled just once in a traditional column still. This method produces a spirit that is often richer and more flavourful, though it generally requires a longer period of maturation in oak casks to fully develop.
Production in Armagnac also tends to occur on a smaller and less industrial scale than in Cognac, resulting in a diverse range of small-batch bottlings. Age labelling is often clearer as well. Because the spirit frequently matures for extended periods, bottles are commonly marked with both their vintage and their year of bottling.
Thanks in part to this smaller-scale, more artisanal production - and the relatively uncommercial nature of the Armagnac trade - some superbly mature brandies from the region can still be found at prices far more reasonable than many of their more famous counterparts from Cognac.