I have not seen or had Araucana bantams. There are Ameraucana bantams and Easter Egger bantams. I've had both. What are your breeding goals? If you are wanting to show birds then make sure you get real ones bantams from a breeder.
My LF Am is much calmer than my bantam ones were but I don't know if that's typical. You might contact the potential source of your future flock and ask about their personalities because it seems a bit is inherited.