I understand from a friend that - are older than + which cause a price difference. As for quality between the two, I'm not sure. I do understand that since the + is newer, not all DVD players can read them. Of course, that's something to consider. My friend uses DVD Xcopy and I've seen him use it. The menu selection is very simple/basic. If you want more than one backup you have to make it off the original because DVD Xcopy will not make a backup of a backup it created.
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