What are the differences of a guru and a lama?

A guru is a spiritual teacher in various Indian religions, especially Hinduism, who imparts wisdom and guidance to disciples on their spiritual journey. In contrast, a lama is a title used in Tibetan Buddhism for a teacher or spiritual leader, often associated with the Gelug school, and typically trained in Buddhist philosophy and practice. While both roles involve teaching and guiding others, the cultural and religious contexts in which they operate differ significantly. Additionally, lamas often hold specific positions within monastic hierarchies, whereas gurus may not be tied to formal institutions.