The difference will be very large. I believe that developing countries have insufficient international influence and their population efficiency is not very high. There are many people living in poverty.
a sad fact is Government persons/politicians of most developing countries are very rich. but the people of that country living in poverty or are medal class. it's all because of the corruption and lack of education. if people educate their kids they could help the country development.
and one more sad fact is when a new generation from developing country complete it's higher education and ready to start a new life. they'll start searching for jobs especially govt jobs. but they hesitate to start their own work. they think of getting big govt posts. but when they don't get a job they start getting panic and involve in alcoholic