Question: Which has more gin, Greyhound or Shrub?

Context paragraphs:
Shrub (drink): In terms of mixed drinks, shrub is the name of two different, but related, acidulated beverages.  One type of shrub is a fruit liqueur that was popular in 17th and 18th century England, typically made with rum or brandy mixed with sugar and the juice or rinds of citrus fruit.

Salty dog (cocktail): A salty dog is a cocktail of tequila, or gin, and grapefruit juice, served in a highball glass with a salted rim.  The salt is the only difference between a salty dog and a greyhound.  Vodka may be used as a substitute for tequila; nevertheless, it is historically a tequila drink.

Greyhound (cocktail): A greyhound is a cocktail consisting of grapefruit juice and either gin or vodka mixed and served over ice.  If the rim of the glass has been salted, the drink is instead called a salty dog.

Supporting paragraphs: Greyhound (cocktail) Shrub (drink)
Answer: greyhound