apples and oranges
US /ˈæp.əlz ænd ˈɔːr.ɪn.dʒɪz/
UK /ˈæp.əlz ænd ˈɔːr.ɪn.dʒɪz/
1.
two things that are fundamentally different and therefore not comparable
:
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Comparing their two businesses is like comparing apples and oranges; they operate in completely different markets.
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You can't compare the cost of a luxury car to a budget car; it's apples and oranges.