Pāramitāyāna and Tantrayāna

Wikipedia includes [this (unreferenced) sentence](https://en.wikipedia.org/wiki/P%C4%81ramit%C4%81#Tibetan_Buddhism) : > According to the perspective of Tibetan Buddhism, Mahāyāna practitioners have the choice of two practice paths: the path of perfection (Sanskrit: *pāramitāyāna*) or the path of tantra (Sanskrit: *tantrayāna*), which is the Vajrayāna. Would you say a bit more about that (for someone who hasn't been taught Mahāyāna practice or Tibetan Buddhism)? For example, some related questions include: - Is the quoted sentence more-or-less true? - Is this a good high-level view of (introduction to, or taxonomy of) Tibetan Buddhism? - What are *pāramitāyāna* and *tantrayāna*: - What is the goal of each? - What is the purpose of each (do they tend toward the goal)? - What (or how) is the practice of each (how, for example, is the purpose implemented)? - To what extent is it true that "practitioners have the choice"? On what basis should or do they choose (e.g. which practice path is suited for, or available to, what practitioners)?