The phrase "largest differences" is correct and usable in written English.
You could use it in a sentence such as: "The study revealed the largest differences in behavior between the two groups."
Observed diversities were significantly different from expected values, and the largest differences occurred in the β2 and β3 components.
The largest differences in gene expression were observed when comparing samples obtained from different organs.
The largest differences were found between the maps of 1990 and 1991.
The smallest and largest differences are for east and north orientations, respectively.
Largest differences appeared with triple glazing and smallest with quadruple glazing.
The largest differences between the models are for the 2015-2020 mean secular variation estimates.
Table 7 suggests that models D and G show the largest differences.
Some of the largest differences in cessation rates occur within primary diagnosis categories.
The largest differences were reflected in the content of hemicellulose, which might influence methane production.
Candidate C2 has its largest differences from the other models in the polar regions.
The γ angle, in particular on satellite C (highest orbit) shows largest differences.
