* Analogous misconstrual: This emphasizes the misinterpretation of the comparison itself, rather than just the unfairness.
* Paralogism: This refers to a logical fallacy, highlighting the flawed reasoning behind the comparison.
* Unconscionable juxtaposition: This implies a deliberate and morally reprehensible act of contrasting things in a way that is obviously biased.
* Fallacious analogy: This directly points out the logical flaw in the comparison, similar to "paralogism."
* Apples-and-oranges comparison: While widely used, it is still a less common synonym than "unfair comparison" and can be considered a bit informal.
Ultimately, the best synonym depends on the specific context and the nuance you want to emphasize.