One of the Vong's most appealing pros, and at the same time one of their biggest cons, is that their ships have very little solid info, both in terms of armament/health and firepower. This pretty much gives them neigh unlimited breathing room. They also have biological ships which can be implemented through different directions, ranging from simply having a ton of health, to having slightly less health then a ship of "equal" or "equivalent" Galactic health, but with much better regeneration and, in the case of Sins, both can possibly make use of shield mitigation, which is something that doesn't really fit with other Star Wars ships. The reason I say the latter is purely due to the fact that you cannot have shield mitigation start off very strong, and then decrease as fire intensifies; if a ship survives and shield mitigation starts to "heal" it, unfortunately, will never stop increasing.
And your assets leave less of a footprint than base Sins. Don't know about SOGE's assets.
SoGE has a horrific footprint, worse then base Sins by a longshot.