Theravada Buddhism and Mahayana Buddhism share the same core beliefs and devotion to the life and teaching of Buddha, but they do have some differences. Theravada Buddhism is associated with South East Asia and is perhaps closer to the original Indian form of Buddhism. As Mahayana Buddhism spread north through Tibet and China, it took on more local customs.
Theravada Buddhism is strongest in Sri Lanka, Cambodia, Thailand, Laos and Burma (Myanmar). It is sometimes called 'Southern Buddhism'. The name means the doctrine of the elders' - the elders being the senior Buddhist monks.
Further Information
In Theravada Buddhism the main Bodhisattvas is Maitreya. In Mahayana Buddhism Maitreya plus non-historical figures are reverre. Theravada suggests Bodhisattvas seek enlightenment first before they can help others stuck in Samsara. In Mahayana Buddhism, Bodhisattvas have greater prominence.