I was just re-reading the Bloodwing Voyages and the Empty Chair, and was so impressed by these novels. I know that Star Trek: Nemesis presented a very different environment and environment from the way it was described in Diane Duane's novels.
Could the differences be explained by saying that ch'Havran and Remus are two different worlds in the Eisn Star System, put perhaps they have both been designated "Remus" at different points in history by Terran astronomers? Perhaps, by the 24th century, the Federation came to realize that Remus (home of the Remans) and the class M ch'Havran are actually two different worlds, or one is designated "Remus I" and the other "Remus II" in some Federation created Star charts ... I believe one novel said that Romulus was the third planet in that system, but that there were ten planets orbiting Eisn, the Romulan star...
Could the differences be explained by saying that ch'Havran and Remus are two different worlds in the Eisn Star System, put perhaps they have both been designated "Remus" at different points in history by Terran astronomers? Perhaps, by the 24th century, the Federation came to realize that Remus (home of the Remans) and the class M ch'Havran are actually two different worlds, or one is designated "Remus I" and the other "Remus II" in some Federation created Star charts ... I believe one novel said that Romulus was the third planet in that system, but that there were ten planets orbiting Eisn, the Romulan star...