"As of June 2006, there is no physical difference between a DVD-R/-RW disc and a DVD+R/+RW disc."
~ About.com

There are technical differences between DVD-R/-RW and DVD+R/+RW recorder formats.

The DVD+R/+RW format offers extra functionality for those who record their own movies.

There are two "families" of DVD at the moment (beside blueray and the like)

  1. "minus" ("-") formats (DVD-R, DVD-RW)
  2. "plus" ("+") formats (DVD+R, DVD+RW),

First, determine if your DVD recorder is limited to one format or the other. If not, then note the following differences:

DVD-R is a write-once format - once you've copied or burned data onto a DVD-R, the data cannot be changed or added to.

DVD-RW - can be erased or rewritten up to a thousand times

DVD+RW offers faster writing, better internal linking, and support for drag-and-drop desktop files (for adjusting the contents of a disk).

DVD+R is a write-once format

There are other difference (see references below), but the above were the only one's that mattered in my situation.

via ~ Ask Dave Taylor and About.com

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