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
Olja	-	Serbian
Allie	AL-ee	English
Siranush	-	Armenian
Edelmira	-	Spanish
Barukh	-	Hebrew, Biblical Hebrew
CristÓBal	kree-STO-bahl	Spanish