apples and oranges, like comparing(redirected from difference between chalk and cheese)
like comparing apples and oranges
Highlighting the similarities and differences between two people or things that are not really comparable at all. You can't compare your job as a nurse to mine as an engineer—that's like comparing apples and oranges! Look, comparing the business model of a small local business to that of a giant global conglomerate is like comparing apples and oranges—they are two completely different things!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
apples and oranges, like comparing
Comparing two unlike objects or issues. This term, dating from the second half of the 1900s, has largely replaced the difference between chalk and cheese, at least in America. The latter expression of disparateness is much older, dating from the 1500s. Why apples and oranges, since they’re both fruits, and not some other object is unclear. Nevertheless, it has caught on and is on the way to being a cliché.
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer