Not that much in character creation, but many other rules, especially combat, have changed significantly. Since the new information isn't always listed clearly as a change, I'll try and provide everything that is necessary.
Twi'lek: +2 Cha, -2 Wis, low-light vision, +1 to Fort saves
Fringer: 1st level gets a bonus feat from Alertness, Armor Proficiency (light), Endurance, Gearhead, Run, Spacer, Weapon Group Proficiency (blaster pistols, blaster rifles, or slugthrowers); one skill to be always class; +2 Fort, +1 Ref, +0 Will, +0 BAB, +3 Defense.
The combat changes replace armor bonus to Defense with Damage Reduction applied only to WP damage; a critical hit goes straight to wounds, where a critical on someone without VP ignores the armor's DR. Attacks of opportunity have been added; if you're unfamiliar with that d20 mechanic, someone can explain it, but it will take a while. Feats and skills have been edited and tweaked; specifics can be posted when needed. There are two truly new things: The tech specialist basic class, which covers basic knowledgable types, and rules for playing droid characters.