They're comparing apples to oranges.

Comparing apples to oranges

They had nothing to do with each other. It's like comparing apples and oranges.

Comparing science and religion isn't like comparing apples and oranges - it's more like apples and sewing machines.

This is an attempt by the city to add apples to oranges.

Comparing Apple to Netflix is like comparing apples to oranges, especially if the oranges made so many mistakes that people stopped eating oranges and just went back to Blockbuster.