Based on current Mazda philosophy, metallic/mica paint should be no additional cost.
From the info at the launch, sounds like no sunroof and no xenon either. Those are big ticket items so I'd imagine they would be mentioned if they are standard. But hey, you do get the SP23 badges, which if the Syd Motor Show is anything to go by, will be on the side of the driver and front passenger doors.
The 2.3L from the MZ6, apart from being detuned to cope with running on unleaded, also has less power due to the single exhaust as opposed to the dual ones in the 6.