The two universes are quite incompatible (as in, in order to make them compatible, you'd have to change fundamental things about the characters, making any comparison moot).
GofyTomcat1 wrote:What if, in an alternate Honorverse, the GA (Manticore, Haven etc)is, as a collective entity, a member of the United Federation of Planets (From Star Trek)?
Several things. One. Star Trek has no stable wormholes by default, when one appears, it's major news (See: The whole of Deep Space Nine). Not having them removes the major feature that made Manticore what it is in the novels. Trade in Star Trek is ill-defined in canon (as in, we have no information about the interstellar economy at all), but we do know that communication is more or less instantaneous within UFP space (and realms connected to it), so even if there was a manticoran wormhole junction, it would not turn Manticore into a major player by itself.
Similarly, as the UFP operates on a post-scarcity economy internally, a lot of the tension factors that have defined interactions in the Haven quadrant simply do not exist.
How would characters change?
Massively. For one, transhumanism is not a thing in ST, neither is large scale genetic engineering. This removes a few background bits (Honor's tweaked body, prolong, human empaths) that do their part to shape how people interact.
How would HH and her people react if they were in Starfleet rather than the RMN?
Not much differently, I suspect. However, recall that the UFP was never as much under threat of war as Manticore was; Other states were either hostile outright (Klingons, Romulans, Dominion, Breen), or neutral verging on allied (Ferengi, Bajor). Haven and Manticore, however, were drifting towards hostilities for half a century before the first shots were fired.
This means that characters would have massively different motivations for joining: Honor states that she joined the service because she felt a confrontation with Haven would be coming and that she would have to do her part to defend her home. In the Star Trek universe, especially post ST6 and up until the Dominion War arc, the UFP was never under threat of war to the same extent. Even during TOS, the most that happened was akin to the US/Soviet cold war, with no real risk of open hostilities breaking out (As I recall, this state of affairs was one of the reasons why ST6's plot happened as it did).
Would Eloise Prichart be President of the UFP *waits for Rosie to start shipping*?
Why would she be? She wasn't much of a political animal until joining the Aprilists, and didn't come into high office until the Theisman coup, so why would she attain such office in a universe where none of the events that actually shaped her could ever happen?
What would happen if Shannon, Montgomery Scott, and Sonja were in the same room?
You could just as well ask about the relative combat capabilities of Honorverse and ST ships. It's a meaningless question, really.
Also: It's hard to determine the relative abilities of these people. Scott, LaForge, Torres and O'Brien are mostly shown to be excellent at on-the-spot troubleshooting and improvisation, the Honorverse engineers mentioned excel at long-term R&D. Different skill sets, one would imagine.
Would Starfleet permit Treecats??
Given that they permit joined Trills to join, sure.
One change any redblooded American male would welcome, is the adoption of Honorverse dress to the regulation micro-mini skirts of Starfleet.
You do know that those weren't a thing outside of TOS and S1 of TNG, right? In other words, they're anomalies in ST canon....
