There is no racial difference between India and Pakistan, but one has democracy and the other has Islam - and oh what a difference that makes!
Indians and Pakistanis have the same Y-chromosome haplogroup. They have the same genetic sequence and the same genetic marker (namely: M124). They have the same DNA molecule, the same DNA sequence. Their culture, traditions and cuisine are all the same. They watch the same movies and sing the same songs. What is it that Indians do and Pakistanis don't: read it here.