As I understand it, the +/- only signify the format type, they do not mean one is superior to the other. They are competing formats.
Go to the site liked above and see if someone has mentioned your particular drive and what they report as to what works best on your drive. And see what works best on any DVD Players you may have.
Knowlege is Golden, and obtaining the knowelge yourself makes it stick, at least in my case.