Both the Ritek and Verbatim (1) were put out in the sun at roughly the same date. The Ritek is a slightly lighter color, and doesn't get as hot (2.5C cooler). The DVD was very light; only got to 50C.
This test is a comparative test between two media, using my particular weather. A re-test from New Mexico/Arizona, would be much faster, but I think similar. So far, I'm confident that the Verbatim data layer is over twice as resistant to this type of abuse.
However, the caveat is that accelerated aging cannot simulate oxygen permeating into the data layer, through the plastic, nor estimate the length of time that the edge will seal.
We are all taking vague shots, when estimating how long any new media type will last, esp if we have no data. But if we have the choice of two media, and one dies rapidly in accelerated aging, it's not a good sign. Having said that, the Ritek BR3 did not die rapidly, compared to a DVD. The HTL data substrate is so good that the final verdict will be in the cupboard, in 25 years.
Originally, when I started burning my first BluRay discs, I was afraid of their fragility, since they are storing 6x the data that a DVD is. However, I have found that they can take an astounding amount of short term abuse. However, all bets are off, if you drop one onto concrete and it bounces on the edge.