Buttered tea is a traditional drink in Tibetan Buddhist culture. It is mainly made of tea, salt, ghee, water, brick tea and milk. It has a strong coffee color and mellow taste, which helps to keep warm, refresh and keep healthy.
Sweet tea, with tea, water and sugar as the main components, tastes sweet and moist, and is mostly traditional tea in China. Sweet tea can be added with lemon, honey, syrup and other materials.
So butter tea and sweet tea are very different in composition and taste.