[jiarongisme]

I personally own a lot of OS press that originate from Taiwan and occasionally Hong Kong as well. They're pretty close to the Japanese press. The audio/video quality should stay the same unless there are errors in the post production with stuff like adding subtitles. PCDL DVD was an example – first Ayu DVD to include subtitles that you can switch on and off, but it got embedded and the video exported in the VCD quality. avex Taiwan then shortly offered a free one-to-one exchange.

With regards to print quality, the Taiwan press ones are often the closest to the original Japanese press. However, there will definitely be slight quality differences with regards to the colours or paper stock. I can't speak for Korean presses because I've never owned them, but I can say that the OS press that China produces are usually... pretty bad lmao.