I picked up the Blu-ray available in England, and it appears to me to have the same picture and sound as the US Blu. It also has the same Carpenter/Russell commentary and the same PIP functionality. But it also has all the other extras from the SD release, including "Terror Takes Shape" in its original form, and the other materials.
The one thing I discovered late in the game was missing from all DVDs after the initial release in 98 was the isolated score track that went with "Terror Takes Shape." It was a nice hidden gem, and I believe they took that functionality off when they did the revised DVD with the anamorphic transfer.







