HOME (Planet Earth style doco) AUS vs UK vs US

[15ofclubs]

Okay so I just watched Home (AUS), PQ looks amazing on my 32" lcd while doing treadmill, haven't fired it up on my 60" plasma yet.

Blu-ray.com specs had the AUS release as MPEG-4 AVC 1080p BD25 at 120mins, was 90 mins including credits & feature only (have sent update), so checked the other regions.

UK is listed as 120 mins also & has 30 min Making of Doco. but is listed as:
VC-1 (29.92 Mbps) 1080/50i BD50

USA is listed as 120 mins with no Making of Doco & is listed as:
MPEG-4 AVC 1080p BD25
oh & Amazon US pricing starts at $85 new, $65 used.

Can anyone confirm UK or US specs. Like the UK's 120min & Making of, but won't the PQ be disappointing? This appears to be, & many comments on forums agree a stunning reference quality blu. Why have a 50BD & put 1080i on it