1, the number of words is different: the full text of Tibetan scriptures has more than 10,000 words, while the heart sutra has only more than 200 words. It takes a long time to recite the Tibetan scriptures, and it only takes a few minutes to recite the Heart Sutra, which doesn't take much time.
2. The content is different: the Tibetan Scripture is equivalent to a life teacher, a textbook to teach us to be a man, and also a filial piety book to teach parents filial piety. The Tibetan Scripture talks about the law between cause and effect.