Override is huge. Many times larger than in EV, it takes dozens of hyperspace jumps to get from end to end. It is populated with lush and beautiful worlds and barren, desolate worlds. In the beginning most of the worlds are forbidden from you. Such as most of the Strand worlds, they don't permit you to land until you join their side if you choose to.
Override are new.
There is the Blaze Turret, the main UE weapon, it has a good rate of fire and does a decent amount of damage. A few missiles are also available, most of them are fast and do some damage as well. The Strands also have some weapons of their own. They however, are a secret until you prove yourself to them. This disappointed me some, but was made up by the other strong points in the game.