Sorry if I missed that but going by standards we use diagonal size and the screen was 86 inch diagnolan as clarified by Sony today.
The image brightness on the HW15 with IRIS off was similar to IRIS 45 on my IN81. So it was less brighter compared to my IN81 (1400 ANSI)
The VW85 was simiar to around IRIS 27 to 36 on my IN81.
If that helps to some extent.