The main difference between Brandy and Cognac lies in their production methods and origin. While all Cognacs are Brandies, not all Brandies can be considered Cognacs.
Cognac must be produced in the Cognac region of France and adhere to strict production regulations, which include using specific grape varieties, distillation processes, and ageing requirements.
On the other hand, Brandy is a broader category of spirits made by distilling wine or fermented fruit juices and can be produced in various regions around the world, each offering its unique flavour profile and characteristics.