So, being of 767ish size... 767ish rates?
A common misconception.
The 787-9 is slightly shorter than an A330-300 and longer than an A330-200.
The 787-9 has a wider fuselage than an A330 allowing an extra seat per row.
Fuselage cabin area is about 5% larger than an A330-300.
Payload capability is close to a 747.
Range: Perth-London.
The 797-9 is no 767 size aircraft by any metric.