I was watching something on the telly recently about boutique gin breweries in That London’s (in) famous East London and was surprised to learn that Gin is in fact flavoured vodka.
Gin is made from grain spirit at 96% alcohol by volume. So its basically pure ethanol. They add some flavours to it by various methods by which time its about 80% by volume. They then add water to make it 40%ish.
I don’t know what Vodka is made of, but I wouldn’t be surprised if it was just grain spirit watered down to 40%.