was prompted this question 2 days ago and din really go to look for an answer for this aged old question. found this article reviewing the question from the technical specifications. the quality of the two is regardless of the media/manufacturer but the standards themselves.
read the full article “Why DVD+R(W) is superior to DVD-R(W)” writthen by Michael Spath yourself, and the reactions below the article were very insightful too!
or if you only want the conclusion: PLUS (+R) is superior to minus (-R) according to the article 🙂
– a Singaporean teacher's storeroom 🖖