As mentioned, though nothing really new the game does expand on the first by including a campaign option with a well thought out narrative that sees things from the viewpoint of the clonetrooper then later stormtrooper.
The main difference is the force numbers, gone is the constant countdown of friendly and enemy forces, for the most part, replaces by key objectives that determine the success of a mission.
As for the space combat element its pretty basic and not very challenging.
My biggest complaint is the sheer stupidity of your fellow troopers, the AI is awful and your men run about catching blaster fire while its up to you alone to reach the objectives. This is even more annoying when you desperatley need backup to capture or hold an objective and none of your men are anywhere near you. Enemy forces casually walk through your troops without even a raised hand against them.
Overall if you liked the first then you wont be disapointed with this