Red Delicious
The Red Delicious is a clone of apple cultigen, now comprising more than 50 cultivars, first recognized in Madison County, Iowa, in 1880. According to the US Apple Association website, it is one of the fifteen most popular apple cultivars in the United States.
Fuji (apple)
The Fuji apple is an apple hybrid developed by growers at Tohoku Research Station (農林省園芸試験場東北支場) in Fujisaki, Aomori, Japan, in the late 1930s, and brought to market in 1962. It originated as a cross between two American apple varieties — the Red Delicious and old Virginia Ralls Genet (sometimes cited as "Rawls Jennet") apples. According to the US Apple Association website it is one of the fifteen most popular apple cultivars in the United States. Its name is derived from the first part of the town where it was developed: Fujisaki.