mix apples and oranges

To combine or compare two different things. You can't compare your job as a nurse to mine as an engineer—that's mixing apples and oranges!

Name	Pronounced	Usage
Fri&Eth;Rik	-	Icelandic
Deion	-	African American (Modern)
Mcdonough	[mək'dʌnə]
CuÁN	-	Irish
Kacey	KAY-see	English (Modern)
Blue	[blu:]