While there may be debate over if a Stout is a type of Porter or a Porter is a type of Stout, for this badge it’s irrelevant. Have 5 Stouts or Porters to claim this badge.

Porters are dark, hopped beers that originated in London. Originally named after the working class carriers, or porters, that preferred the style, there may be no more famous example of the style than Fuller’s London Porter.
The name Stout means strong, and originally described a strong Porter. However now Stout is regarded as a style in it self. The most famous stout in the world has to be Guinness, even though it is about 4.2%, hardly qualifying as a strong beer.
There are many variations of both styles, as can be seen by the list of styles that count towards this badge: Porter – American, Baltic, Coffee, English, Imperial/Double, Imperial/Double Baltic, Imperial/Double Coffee, Other. Non-Alcoholic Beer – Porter / Stout. Stout – American, Beligna, Coffee, English, Foreign/Export, Imperial/Double, Imperial/Double Coffee, Imperial/Double Pastry, Imperial/Double White, Imperial/Double Milk, Imperial/Double Oatmeal, Irish Dry, Milk/Sweet, Oatmeal, Other, Oyster, Pastry, Russian Imperial and White.
There are also separate badges for both Porters and Stouts (To The Port and Beyond a Shadow of a Stout), as well as some notable sub-styles: Oatmeal Stouts (Oat of this World!), Coffee Porters and Coffee Stouts (Wake Up and Smell the Coffee), Pastry Stouts (Dessert Time!), Milk/Sweet Stouts (So Udderly Sweet) and Russian Imperial Stouts (Imperial Czar).