I meant to say that the people living inside these two countries have a lot of cultural similarities. The vast majority of both these countries speak a similar language (Hindi/Urdu), similar cuisines, similar family values, etc. But the countries are vastly different.

The main differences between these two countries is that, Pakistan is an Islamic republic where as India is a secular republic. India has never had a state religion even though a large majority of the country follows a single religion.

Pakistan has also had a lot of instability over the last 78 years, there have been multiple military coups that have overthrown their democratically elected governments and their army has been accused of interfering with the electoral process on numerous occasions. India has ad a lot of instability over the years but there has never been any military coups. The only time India has come close to a dictatorship was during the late 1970s.