Tibetan thanka painting has become very popular in the world market, when people speak of thanka, Tibetan thankas are what they have in their mind. Although in its early stages Tibetan thanka painting was highly influenced by Nepalese style, after the 16th century, marked differences between the two styles began to appear.
How can we distinguish Nepalese painting from Tibetan?
Difference between Tibetan Thangka and Nepalese Paubha Painting
More here: http://www.artsofnepal.com/nepali-art-news/16/paubha-paintings.html