They are called Dharmic religions, though each is very dissimilar to each other.
The Cast System
Buddhism rejects the Hindu caste system, a controversial aspect of Hinduism.
Hinduism, Buddhism, Christianity, or Zoroastrianism
certainly Buddhism was opposed to caste system. Hinduism invented caste system.
daoism
The Caste system for social classes was the way of life back in the day. Mostly Hinduism,Sikhism, and Buddhism
Hinduism has 4 casts. Brahmin, Khsatriya, Viashya and suta. Meanwhile Buddhism is free from any kind of cast system.
Hinduism.
Daoism
Hindus and Buddhists have different sets of sacred texts. However, Buddhism came from Hinduism and hence both of their religious concepts would have similarities. One Correction. Buddhism did not come from Hinduism. Buddhism has no belief in any long-lived gods, have no defined or required rituals, no priests and no caste system Many early Buddhists practiced a very early form of Hinduism (actually closer to Brahmanism) but gave that up when they converted.
Buddhism was originated from injustice of Hinduism and Caste system. Buddhism focused on personal welfare rather than worshipping god and treated everyone equally.
Hinduism believed in Caste system and social structures, while Buddhism gave everyman same right and acceptance. this was the major factor that led Buddhism to develop separately from Hinduism.