No need for priests (brahmins) or rituals.
2) Anyone can enter Nirvana, no matter how lowly, whereas in Hinduism only the brahmins could achieve moksha.
3) In Theravada Buddhism, there are no gods. The Buddha is not a god.
4) Karma is not earned by following the dharma of your caste. Instead you can move toward entry into Nirvana by following the eightfold path.
5) As the "middle way" Buddhism rejects extreme asceticism as well as great wealth. The ideal in Hinduism is extreme asceticism.