by/in comparison

by comˈparison

(written) used especially at the beginning of a sentence when the next thing that is mentioned is compared with something in the previous sentence: By comparison, expenditure on education increased last year.
See also: comparison

by/in comparison (with somebody/something)

when compared with somebody/something: The second half of the game was dull by comparison with the first.The tallest buildings in London are small in comparison with New York’s skyscrapers.
See also: comparison