its a silly thing to ask, its just religion and effect is purely based on belief. whether Hindus are in India or anywhere else in the world, praying and religion is not different.
Contemporary Hinduism is now divided into four major divisions, Vaishnavism, Shaivism, Shaktism, and Smartism. Vaishnavism has 580 million followers, while Shaivism has 220 million followers. The primary differences are between the sects of Vaishnavism which conceives God as Vishnu, and Shaivism which conceives God as Shiva.