The main difference between the parliament house and the Rashtrapati Bawan is that the former is the working house of the the two houses Lok sabha and Rajya sabha while as the latter is the offical home of the president of India where he take his workings.There is also difference in the building structutres of the two while the former is small based on Ashoka chakra while as the latter is the largest in size than Parliament house.