Different to: Japanese pressing with different matrix.
For only one day, January 3rd 1969, the cameras at Twickenham were fed from separate audio feeds. Yellow Dog has taken the Nagra tape recordings from Camera A and Camera B and synchronized the only parts that match. This gives us the only "stereo" recordings of the entire series of rehearsals. The material was not first-rate, and there isn't a lot of playing, and the songs are incomplete - either due to them stopping, or one of the reels running out of audio. But the parts that sync reveal an astonishing binaural effect when heard through headphones. It's like "you are there." Yellow Dog gets an A for effort.