What’s the difference?
The word ‘brandy’ comes from the Dutch term brandewijn (burnt wine), which describes the manufacturing process involving heating wine, extracting alcohol and ageing.
All Cognacs are brandy, but not all brandies are Cognac. Some award-winning South African brandies are made in the Cognac style, but they may not be called Cognac because the term is geographically delimited and refers only to brandy distilled in and shipped from the area surrounding the town of Cognac in France.
To carry the name Cognac, it must also be made with legally specified grapes, be twice distilled in copper pots and aged in French oak casks for a
minimum of two years.