But probably like a lot of introductory box sets, the rules as given in the EotE Beginner Box will probably be different from the EotE corebook when that hits shelves in a few months.
Admittedly, from what I've seen and heard, the Beginner Box adventure does a pretty good job of getting players and GMs comfortable with the dice pool system (the biggest stumbling block that I've seen so far for folks new to the system).
Personally, I think the pregens are a bit lackluster in most instances, as none of them take advantage of talents offered, possibly not even until the end of the intro adventure.
I had one group that I ran using the pre-gens, and another that I let make their own PCs using the Beta rules. The second group with their own characters had a lot more fun, though a decent portion of that was probably due to having a greater vested interest in their characters as well as a better grasp of what those characters could do, especially as they each had taken a few talents to give their PCs a bit more spice.