DVD-R vs. DVD+R

I've been looking at recordable DVD media. Can someone briefly explain the difference between DVD-R vs. DVD+R (My Plextor DVD Burner can handle either)?

Thanks.

 

Here is an article on DVD+R vs. DVD-R discs. http://www.cdrinfo.com/Sections/Art...Headline=DVD Media Format Compatibility Tests DVD+R has been cheaper in my experience, and I haven't had any compaibility problems yet.

 

I was told that - came out first and is being outdate < how its being outdated I dunno. He told me + was wut is gonna be used more and it has better quality. I dont know if thats tru, if it isnt correct me.