Green and red curry are both popular types of Thai curries, but there are actually quite a few differences between them. The most noticeable difference is the type of chili peppers used to make each one. Green curry typically uses green chilies like jalapeños or Serranos, while red curry usually uses dried red chilies such as cayenne pepper and dried Thai peppers. This means that green curry is generally milder than red curry as the chilies in green curry tend to have a lower Scoville rating—the measure of how spicy something is. In terms of flavor, red curry tends to be more complex due to the longer cooking process and different spices used in its preparation. Red curries often include ingredients like garlic, ginger root, lemongrass, coriander seed, cumin seeds and galangal which all create distinct flavors. On the other hand, green curries can vary greatly depending on individual recipes but they tend to rely mainly on lemon grass for its distinctive citrusy taste along with other herbs and spices like white pepper or turmeric for depth of flavor plus coconut milk for creaminess and sweetness.