This is an upgraded, Block-2 derivative o' t' original AC Orion.  Based around t' updated Cobra nose cone, shiver me timbers, t' new model is slightly longer than t' previous version.  With basswood win' structures, shiver me timbers, it is also more rugged as well as better armed. 

T' Block-2 version is optimized for engagin' and targetin' capital ships rather than operate in a mixed strike fighter role, and as such has a brand new fire control system, Astromech droid integration, and uses an ion cannon, laser torpedos and a particle cannon in addition t' quad-turbo lasers.