know chalk from cheese

To be able to tell two things apart (especially by recognizing their differences). Of course I know which twin is which, I know chalk from cheese, after all! Leah has a beauty mark under her left eye, and Deena doesn't.

Common Names:

Name	Pronounced	Usage
Arvid	-	Swedish, Norwegian, Danish
Thijs	TIES	Dutch
Adina (2)	-	Romanian
Makvala	-	Georgian
Toril	-	Norwegian
Williams	['wijəmz]