When it comes to winter beers, there’s no topping a rich, robust stout or a sweet, malty porter. To the uninitiated, the two beer styles seem strikingly similar. And while if you like one you’ll probably like the other, they are made up of different ingredients and have a slightly different flavor profile.

While the stout style is more popular with contemporary drinkers, the porter came first. The porter was a popular style in England in the 1700s. At some point, brewers began brewing what they referred to as “stout porters.” They were traditionally higher alcohol and had a more robust and bitter flavor. Modern porters and stouts have taken on a life of their own, with a few key differences between the two.

The original stout actually comes from the original porter. A higher alcohol porter was called a “stout porter” among workers in London, and eventually the latter part was dropped and stouts became a category of their own. There are varying definitions of a stout depending on who you ask, but most experts agree that the style is known for its dark (sometimes pitch black) appearance and having a roasted malt, creamy, lightly bitter flavor profile. Common flavors include dark chocolate, coffee, and dried fruits.

While you could simply say that you love stouts, many drinkers would want to delve a little deeper to find out what you truly enjoy. This is because the stout style is very complex and has myriad offshoots. They include dry Irish stout (like the wildly popular Guinness Stout), oatmeal stout, milk stout, pastry stout, oyster stout, coffee stout, imperial stout, and barrel-aged stout.

Conversely, a porter is known for generally having a lighter flavor profile and lower alcohol. (There are exceptions, of course.) Porter flavor profiles usually included roasted malts, chocolate, coffee, and floral, earthy hops. Contemporary porters are known for their balanced flavor profiles.

Just like with stouts, there are many different subcategories under the porter umbrella. They include the English porter, Baltic porter, imperial porter, and barrel-aged porter.

Porters and stouts share some of the same flavors and aromas. This is why it’s difficult for some drinkers to differentiate between the two beer styles. Roasted malts, chocolate, coffee, vanilla, and dried fruit flavors can be found in both styles. The two styles also share some of the same ingredients. They’re both brewed with barley, water, hops, and yeast. The difference lies in the way the barley is prepared before brewing.

While porters and stouts are both brewed with barley (like many beers), the major difference between the two is that stouts are brewed using un-malted roasted barley (giving it the roasty, robust, coffee, bitter flavor stout fans crave) and porters are brewed with malted barley (giving them the sweeter, rich, chocolate flavor porter fans love).