There are a few reasons I picked the Fuji, the main one being that I really like the design more than the Chiaki or Plumeria. However, there are other reasons as well. my plan for their own design is for it to be a large heavy gunship. That means the Fuji is more comparable than a Plumeria or a Chaki. Also, one of the roles I see them playing is in escorting convoys of other kinds of ships, where the longer range is an advantage. The Plumeria is an older design for being search and destroy and artillery that later proved useful in other roles. The Chiaki was at least designed for the role. However, I imagine that in the coast-guard-ish role, that the shuttle bay sees a lot of use. The Fuji has a larger shuttle bay. Cargo, also the Fuji. The Fuji also has more and better weapons. Chaki and Fuji also have similar crew compliments. ~100. In pretty much every way, the Fuji is a superior ship. It's also more comparable to the ship I'm imagining in my head that they eventually build than the Chiaki or Plumeria. I'm not going to say they don't use any, but those would be in the minority.