Same difference is an informal phrase referring to two or more alternatives that while different, render the same outcome or so close to the same outcome that the difference is negligible. Same difference is used when two different things are different, but equivalent. Same difference is an oxymoron, which is a literary or rhetorical device in which two contradictory terms are used together for emphasis or poetic effect or to arrive at a unique meaning. Presumably, same difference comes from a melding of the word same and the phrase no difference. It first appears in 1945.
The figures on the latter are Bacchus and Venus, not Pettit and Wizenberg, though some might say, same difference. (The Seattle Times)
In plain Jamaican parlance, “same difference” usually means “no better herring, no better barrel”, but hard-core supporters of both parties would be the first to say otherwise with respect to the ruling People’s National Party (PNP) and the Opposition Jamaica Labour Party (JLP). (The Jamaica Observer)
When this was pointed out to him in the House, Harper responded: “NDP, CCF, same difference.” (The National POst)
November 2016 will not change a thing – 8 years of Hillary or 8 years of a non-Hillary. Same difference. (The Business Insider)
In the comic, he ends up getting his head bashed in with a baseball bat at the hands of the villain Negan, not getting his guts ripped out near a dumpster, but same difference, right? (The Huffington Post)
“Are they huge plays? Absolutely. But (tackle for loss) is the same difference,” Allen said. (The Charlotte Observer)
Agriculture thinks that has a bad ring. So it spins different figures: 50% of all California water goes to the environment, 40% to farms and 10% to cities. Same difference: Agriculture uses four times as much water as urban areas. (The Los Angeles Times)