The PreDVD and EUDVD rips are normally the camrip's which are released itself on the day when the movie is released.The running shows are recorded through a camera hence the name CamRip.
PreDvDs are released prior to the official released of DVD's.So dont expect better quality here.
EU (European Union)DVD's
Since they are camrip's the quality is awful ...
If u want some quality better wait for DVD Rips.