I't doesnt matter if its presented as an orion icon as long as its hecate no doubht about it.
One: there is absolutely no canon evidence besides that Command Brief that determines what class the Cyrene is. Flagship + destroyer =! Hecate
Two: Considering every single briefing icon in a Command Brief represents a ship as its exact class (the Aquitaine as a Hecate, Psamtik as Hatshepsut, Repulse as an Orion), we can assume that the Cyrene is an Orion as depicted. If it was a Hecate, there would have been more than enough room in the Command Brief to replace the Orion image with a Hecate.
Three: Just because the wiki says it doesn't mean it's true. The wiki is still peer-edited, and I've come across plenty of inaccuracies myself.
The deimos uses vasudan tech. Make no mistake about it.
I know that the Deimos uses a Vasudan reactor. My question was why a Deimos was using a Vasudan commander's voiceover in addition to the player being ordered to engage whatever fighters launch from the Deimos.