Correcto: el disco 3 presenta los montajes cinematográfico, internacional y montaje del director vía seamless branching y el disco 4 contiene extras.

Disc 3 - three versions on one high-definition disc (1080 - VC-1 encode). Like on the SD they were seamlessly branched and therefore all shared the same color scheme and transfer qualities.
Fuente de la review: http://www.dvdbeaver.com/film2/DVDRe...HD_Blu-ray.htm