Verbatim DVD discs: What is Advanced azo???

Hi guys,

I've heard that blank DVD discs from Verbatim are one of the bests.
As my DVD-Burner can only deal with DVD minus I have found the
following
from Verbatim:

http://www.amazon.co.uk/Verbatim-435...1025242&sr=1-1

http://www.ebuyer.com/product/117962

The first link is with amazon and the other one with Ebuyer.

Similiar prices - but what is the difference between the discs?
The latter one with Ebuyer is "Advanced azo".

But what is "Advanced azo"? Can I simply stick with the "normal"
discs?

Thank you,
Julia