Nah the Creation Engine isn't Gamebryo, it's similar IIRC but I'm almost certain that they're two distinct things.
Or at least the Creation Engine is different enough from Gamebryo that it warrants having a different name.
I am also somewhat unsure about giving the character a voice, I mean sure, it's a nice touch I guess but it does make it more difficult to project a specific character onto the character you've created. That is unless they give an option to turn the voice acting off, which I think they probably will.