The phrase "are not necessarily comparable" is correct and usable in written English.
You can use it when discussing items, concepts, or situations that may not be directly compared due to differing characteristics or contexts.
Example: "The two studies provide valuable insights, but their methodologies are different, and their results are not necessarily comparable."
Alternatives: "may not be directly compared" or "are not directly comparable".
First of all, we have to stipulate that the situations are not necessarily comparable.
Most of the models that make popular vote forecasts are more driven by economic factors, while those that make Electoral College picks rely more on polls, so they are not necessarily comparable.
On the other hand, if the hypotheses of Theorem 3.4 hold and, then and are not necessarily comparable.
He added that, as a result of this, records set in different eras are not necessarily comparable.
Of note, our results using selected image sets from nonconsecutive examinations are not necessarily comparable with those of prior studies that used consecutive examination series.
However, the majority of research done on these issues has been performed on extracted teeth and these studies are not necessarily comparable to the situation in vivo.
Tuesday's bonkers news conference in New York was Trump's latest act of "whataboutism," the practice of short-circuiting an argument by asserting moral equivalency between two things that aren't necessarily comparable.
Although Japanese women, who have low breast cancer rates, have a lifelong exposure to high dietary soy, their situation is not necessarily comparable to midlife supplementation with soy isoflavones (estrogen-like compounds) in Western women.
The committee also said it recognized that its failure to identify such an error would "not, at first blush, satisfy the scientific or general public". In finding that patient safety was not compromised, Mr. O'Hara and the committee said the two agencies' reviews were not necessarily comparable because they had different purviews.
We consider that this pool of candidates is very heterogeneous and it is not necessarily comparable to high school graduates.
Though Bush has the power to hire and fire U.S. attorneys, some observers said the two cases were not necessarily comparable.
