Needless to say I disagree with DVDBeaver on what the film is supposed to look like.
All caps are taken with VirtualDub and bicubically resized to 1024x576.
US top.
Korean bottom.


Korean version is heavily cropped, window-boxed and edge-enhanced.
On the plus side, compression artefacts are non-existent and it's a bit sharper than its american counterpart.
Can't comment on the colour scheme... yet.


Grass is supposed to be green. Sky is supposed to be blue.
This is one of the many shots that make me think that the R1's print has the correct colour scheme.
The korean version just looks washed-out. For such a colourful film, that doesn't seem right.


And now for a closer look:
(caps are upscaled to 1920x1080 and then cropped to 1024x576)




In the end, it's just a matter of preference.
If edge-enhancement doesn't bother you, and if your TV suffers from overscan, then the korean disc is fine.
If you've got a big screen and you want to have the full picture, get the R1. It might be an old disc, but it's still the best version out there IMHO.
The subtitles are identical.
R1 has yellow subs.
R3K has smaller white subs.