My comments on -R Vs +R always sticks to the technical
And presuming that the media of either is of equal quality the +R
are more tolerant of damage (slight scratches)
as for "age" deterioration that is a matter of storage conditions and deterioration of the dye which is the same in both types of discs.
Just like with RW discs gradually "erasing themselves"
because the metal alloy will gradually change from the
amorphous state back to the crystalline state resulting
in a loss of data.
And while some manufacturers claim centuries for +/- media and up to 25years for RW media it is fairly obvious that neither has been around that long and their estimations may be pure BS.
There is no difference in price between the two types +/- media
but the ADIP and larger pits of the +R make them both a bit more readable and a bit faster for many drives to read as data discs.
Not a huge difference, but...
Frankly if you know one thing works for you and another one doesn't the choice
is really a "no brainer"