One of the characteristics of the Gas Giants Conglomerate is that these folks are rich. Stupidly rich - Jeff Bezos wishes he was this rich. As such, the GGC can invest a lot of money into their equipment than the Terrestrial Planetary Navy. More expensive doesn't always mean it performs better but it does look flashier.
This is a concept we are working on for the GGC, a multi-role bomber/transport that can deliver payloads and troops in style!