'unfavourable comparisons' is a correct and usable phrase in written English.
It can be used when one wishes to contrast two items, people, or ideas that are not similarly advantageous. For example, "The recent study revealed unfavourable comparisons between the two schools' educational standards."
Iceland is facing some unfavourable comparisons.
Some drew unfavourable comparisons with their own people and governments.
He reportedly called the holy book of Islam "one-dimensional" and drew unfavourable comparisons with the "incredible stories" of the Old Testament.
Those turning out for campaign meetings often say they are undecided and make unfavourable comparisons with the calibre of Republicans who canvassed for their support in the past.
Who would have thought the swashbuckling one-time Goldman Sachs chief would be suffering unfavourable comparisons with the dour Scottish solicitor running Britain's Treasury, Alistair Darling?
It is an undeniable fact that in Hollywood, those with the word "junior" appended to their names have to endure unfavourable comparisons with those whose names they bear.
Inverdale's comments, which included an unfavourable comparison with Maria Sharapova, resulted in more than 700 complaints to the BBC.
"That's something that is in the public interest and sounds like it should be reported without the unfavourable comparison to what was clearly a criminal act".
His books have generally received generous praise from critics, though his most recent novel about Henry James, Author, Author, suffered from inevitable and unfavourable comparison with Colm Toibin's The Master.
However, Norton managed to depict the all-singing, all-dancing preppy boyfriend in such a way as to preclude anyone ever doing so again for fear of unfavourable comparison.
Mensinck said there was "no way Queensland Nickel could continue to employ so many people without any support from the Queensland government", drawing an unfavourable comparison with the New South Wales government's support of steel producer BlueScope.
