What is the difference between these two? Why should I use one over the other. I do realize that DVD-R is more compatible with lesser priced DVD Players. Anything will play a DVD-R but not a DVD+R. If that's the case, then why do DVD+R exist at all. What is the purpose of them? Why should I buy them. What are the technical differences between the two. Is one better than the other. If so, then why? I purchased DVD+R because that's what COSTCO had. COSTCO had a panasonic DVD Player for $50.00, but it would not play DVD+R. I had to go with the Sony for 70.00. It will play anything (DVD-R/RW and DVD+R/RW).