Thai and Indian curries share some similar spices like ginger, garlic, turmeric and cilantro. Thai dishes include brighter and lighter spices, curry pastes and lemongrass, and almost never use dairy. Thai curries use a lot of coconut milk (dairy free) whereas most regions in India (except for the south) prefer yogurt or cream in their curries. Indian curries are velvety with a thicker consistency. They often include tomatoes like our squash curry recipe. Common spices like cinnamon and cumin in Indian curries are rich and flavorful. Here is an excellent detailed article by Asia Highlights on the differences between Thai curries and Indian curries.