The difference between gdp and gnp lies in different usage, different data reflection and different emphasis.

① Different usage: GDP data is used to analyze the economies of countries around the world, and GNP data is used to analyze the differences between the rich and the poor in countries around the world.

② The data reflect differently: GDP data mainly reflects "a country's output and economic strength"; GNP data mainly reflects "the economic situation and development level of a country or region".

3 different emphasis: GDP data, emphasizing "added value created"; GNP data emphasizes "original income obtained".