This is another thought experiment that Kirsten Beyer took on in her Voyager Full Circle sequence in the Relaunch Treklit novelverse.

There were a lot of questions about whether their ethics were in fact shared or parallel with that of the Federation as well as whether they really were who they claimed to be on the surface.

Another Relaunch Treklit exploration involved a very different Breen society than Discovered unveiled. Instead of a single species, Breen turned out to be a multiplicity of species with different environmental requirements who all spent all their lives in environmental suits other than in their own homes. In the Relaunch universe, the Breen achieved species, race and gender equality by completely hiding their physiology and masking their voices.