What is the difference between red pandas and normal pandas?

Red Panda

The red panda, is a small arboreal mammal native to the eastern Himalayas and southwestern China and related to raccoons, skunks and weasels. It is the only extant species of the genus Ailurus and the family Ailuridae. Wikipedia

Scientific name: Ailurus fulgens

Rank: Species

Higher classification: Ailurus

Giant Panda

The panda, also known as the giant panda to distinguish it from the unrelated red panda, is a bear native to central-western and south western China. Wikipedia

Scientific name: Ailuropoda melanoleuca

Rank: Species

Higher classification: Ailuropoda

Lower classifications: Qinling Panda, Ailuropoda melanoleuca melanoleuca