The sequel is pretty bad. I mean, it's not horrible, but the story is nowhere near the same.
Most the game is spent mediating a dispute being Czerka Corporation and the factions that oppose them. And it feels even longer and more tedious than it is.
But there are a few winks and nods to the original dispersed throughout, including quite a few in reference to the bipolar assassin droid. Get it only if you really must have another KOTR fix.