未可同日而语

lit. mustn't speak of two things on the same day (idiom); not to be mentioned in the same breath; incomparable

lit. to speak of two things on the same day (idiom); to mention things on equal terms (often with negatives: you can't mention X at the same time as Y)

cannot compare to; to be no match for

to discuss two disparate things together (idiom); to mention on equal terms; to place on a par with

can't compare with

to draw an impossible comparison