I own the US season 3 Blu-ray set. On the rear cover it mentions "Over 10 hours of addicting extras and commentaries" and "commentary on 9 episodes".
While trying to find specs of non-US Blu-ray releases, the UK, German, Spanish, French, etc the rear covers say "Over 3 hours of addictive extras" and "commentary on 5 episodes".
There were rumors on Blu-ray.com and other sites that the non-US releases had fewer extras, censored episodes, and less extras, although I couldn't find concrete info from any owners of the set.
But when the complete series set was released, UK owners stated all the commentaries and extras from the US set were included on the UK set. So were the complete set discs different from the individual season sets?
I asked Sony Home Entertainment UK directly and after about 2 weeks of researching, they answered back:
So that's the word from Sony, but if anyone can confirm otherwise, it would be helpful.Hello again,
Sorry for the delay in answering, our team had to check our products database.
We’re happy to confirm that the discs in the individual S3 Blu-ray and the discs in the Complete Series box set (in the UK) are the exact same ones, with the same content.
They include the 13 uncut episodes as well as commentaries for nine episodes.
The available audio and subtitles are the following:
• Audio = English, French, German
• Subtitles = English, Arabic, French, German, Turkish
So far it is confirmed that the Season 4 non-US individual seasons had no commentaries, while the complete series added all the commentaries to the season 4 discs.