|Kiddy Grade-Volume 6: Mirror Image||R1|
The Region 1 version of this disc is quite similar to this one, but it was released in September 2004. It contains the same episodes, the same extras (save for the trailers), and the same artwork.
The Region 1 version uses alternate angles to provide different song subtitles and different credits on the opening and closing themes, which is a neat idea. The Region 4 disc also offers English or Japanese credits depending on your choice of language.
The Region 1 version is reported to have an excellent transfer. I'd be tempted to get the R1 because of the aliasing, but apart from that, I think the differences are small.