Brandy is distilled wine and Whisky is distilled beer. Consequently they have slightly different flavour sets and you will likely find you prefer one or the other. Brandy tends to be subtler and the results of the barrel storage (i.e. flavours of caramel and vanilla and dried fruit) are more apparent at a younger age.
From a consumer point of view, all you need to know is most whisky sold is between 5 and 20 years old (i.e. stored in a barrel for that length of time) and most Brandy is between 2 and 10 years old.
The older it gets the more it costs in both categories. Advocates of both flavour sets are legion and unlikely to believe the other equals their spirit of choice for quality.
I stand to be corrected.
From a consumer point of view, all you need to know is most whisky sold is between 5 and 20 years old (i.e. stored in a barrel for that length of time) and most Brandy is between 2 and 10 years old.
The older it gets the more it costs in both categories. Advocates of both flavour sets are legion and unlikely to believe the other equals their spirit of choice for quality.
I stand to be corrected.