I think a more fair comparison is Fleet Ning'tao vs. B'rel retrofit.
The B'rel has a higher turn rate (by 1), a larger shield modifier (.8 vs. .66), a stronger hull (21,000 vs. 16,500), and the Enhanced Battle Cloak.
The Fleet Ning'tao's advantages are one additional boff power and a larger crew (75 vs 30).
Their consoles and weapons are the same. Their cost in IRL money is also the same: 2000Z for the B'rel vs. 4 FSMs for the Ning'tao.
I think that, at the very least, they should have the same hull strength and shield mod. Don't tell me that there are any Lt. Commander powers in the game that offset the Ning'tao's disadvantages, because there aren't.