The Nebulon-B2 Frigate is nothing more than an upgraded version of the Nebulon-B Frigate, designed for heavier combat. It boasts more turbolaser and laser cannons, and sports a warhead launcher. The Nebulon-B2 is also significantly faster than the original.
To accommodate its increased amount of weaponry, the design of the Nebulon-B2 is slightly different than the Nebulon-B. The main deck section has been split into to angled wing-like projections, providing more places to put weapon turrets. This version of the warship is also slightly shorter in length. Unfortunately, this has caused the vessel to have a slightly lower shield and hull strength when compared to its predecessor.
Despite its shortened length, this version of the frigate has a larger crew compliment. It also boasts a larger troop compliment, though its fighter compliment remains the same.