[QUOTE=arej00dazed;2194526]as the title states, whats the difference and which one should I be using?
CSS, or Content Scrambling System, is one of the first copy protection systems used on DVDs (and one of the first defeated). A copy program with this feature is one you definitely want (See DVDFab.com).
The non-css version is the one that does not remove this copy protection, and most likely is [B]NOT[/B] the one you want. (See DVDFab.net).
Hope that helps you decide.