The problem with some brand of media is you might not always get the same media. They use different manufacturers and can change without notice.
If you install the program imgburn it tells you who actually made the media. It is a small program , free and doesn't install any junk.
http://www.imgburn.com/
Put in the dvd, click discovery and scroll down , section will read like:
Physical Format Information (ADIP):
Disc ID: CMC MAG-M01-00
Book Type: DVD+R
Part Version: 1
Disc Size: 120mm
That was a HP lightscribe media.
If I go here:
http://www.videohelp.com/dvdme...h=Search+or+List+Media
I can see it is being used in a lot of brands
For me I only buy Sony Accucore media if I buy it in the store as the actual media is usually Taiyo Yuden, who make good media.