The aurora has significantly more converging mounts so I'm not sure how fury could have better weapon convergence. Aurora also has double the dissipation and a better maneuverability system, so it can easily chase down any non-so frigate already.
I had stopped using that aurora a bit when I was fighting lots of capital ships, but then I got some spoilery weapons and now I'm using it again.
Having used both as a Flagship with analogous mounts, it's tough to really recommend the SO Aurora over an analogous Fury. Doing the obvious loadouts of Heavy Blasters, Sabot Pod, and AM Blasters to taste, the Aurora packs appreciably more punch...but not enough to justify being
double the deployment points. Even accounting for the fact that officers are a limited resource and you really want to make the most out of every ship you put them in, there are absolutely more impactful ways to spend 15 DP on upgrading a ship than going from Fury > Aurora. On top of all that, the Fury has a significantly more efficient shield (going from 0.7 to 0.8 may not seem like much, but it's substantial) and a capacitor pool that's nearly as deep, meaning that combined with slightly better mobility I've found it to be more durable in practice. Then you've got to think about the campaign-level differences. The Fury is much cheaper to acquire, has half the upkeep, and burns fast enough to naturally cruise with Destroyer fleets and be a huge bully in the early game.
Again, the argument here is not that the Fury is
individually superior to the Aurora (it isn't) or that an SO Aurora won't pull its weight in a fight (it will) - it's that the SO Fury is an absolute monster for what it costs and upgrading it to an Aurora doesn't justify the investment.