How are a building and a house similar? How are they different?
similar: both have windows, doors, people inside different: size, one is much taller
How are an apple and banana similar? How are they different?
similar: fruits, healthy different: shape, size, color, texture, location grown, etc
How are a cat and dog similar? How are they different?
similar: pets, animals different: size, one barks one meows, color, demeanor, etc