They are closely related members of the same family of plants, Solanaceae.
They both grow.
Not all are. While the common Idaho brown potatoes are typically extended in one direction, some other potatoes (notably the red and "new potatoes") are round in shape.
potatoes and onions
Potatoes
Bread, potatoes, McDonalds !
They can all be hot.
Maine
corn and potatoes
Some popular varieties of potatoes include Russet, Red, and Yukon Gold. Yellow potatoes like Yukon Gold are a common choice for cooking due to their creamy texture and buttery flavor.
potatoes, tomatoes, broccoli, sprouts
chitin
brown a gooey