technically, not that i'm aware of
The video can be different. If the disc comes from North America, parts of South America, and most of Asia, it's NTSC. If it's from elsewhere, it's PAL. Most PAL-native equipment can play NTSC discs but the opposite isn't very common.
Anyway, there can be differences depending on who releases it, but assuming the content's meant to be exactly the same, other than region coding and the PAL/NTSC thing, there aren't any significant differences.
could someone tell me if it sounds better in 5.1 audio? cause the PCM is good but not good enough,
Wait, there's a disc with PCM audio? Mine only has Dolby Digital and DTS. I'd like to have a PCM track! Anyway, the DTS track sounds fine. I don't have a surround rig but the audio's clear and all that.