This title was released on DVD in Region 1 last year. The Region 1 disc has a noticeably better transfer, with better colour rendering, and a slightly sharper transfer. It has some background shimmer, although I'd estimate it as a bit less that on the Region 4 disc. Its shadow detail is no better, though. The only difference in extras is that the Region 1 disc has a lengthy bio of Alec Guinness (the same content as the other discs in this series, but with a different background).
I have to give the award of the golden whatzit to the Region 1 disc in this case — the transfer is sufficiently better to make the difference.