Supermarionation (a portmanteau of "super", "marionette" and "animation") is a puppetry technique devised in the 1960s by British production company AP Films. It was used extensively in the company's numerous Gerry and Sylvia Anderson-produced action-adventure series, the most famous of which was Thunderbirds. The term was coined by Gerry Anderson, possibly in imitation of Ray Harryhausen's stop motion technique.
Thunderbirds is a British mid-1960s television show devised by Gerry and Sylvia Anderson and made by AP Films using a form of puppetry dubbed "Supermarionation".
Taken from the Louis Armstrong Lyrics to "Let's Call The Whole Thing Off":
"You like potato and I like potahto, You like tomato and I like tomahto
Potato, potahto, Tomato, tomahto, Let's call the whole thing off."
Used by somebody comparing two things that are essentially interchangeable or two words for the same thing.