Raammat is a butyl mat.
Fatmat is asphalt.
And it doesnt matter if the asphalt is still there after 5 years. It is dried up and not doing its job. Its just hanging there not doing anything...It is really hard not to post an innuendo after this btw...
For anyone considering edead, even the butyl mat that they do sell has mylar backing instead of foil. Even though its butyl, it still only does about as good of a job as an asphault mat becasue the aluminum is a big part of what makes the damping material work. It is also inherently why second skin damplifier pro is in most peoples opinion the best mat currently available.
Im not saying that raammat is bad, becasue it is by far the best "bang for your buck" mat available and likey what I will be using.
That being said, there is only a 10 mil difference in the butyl layer (60 vs 70), but the foil thickness on RAAMmat is 2 mil compared to Damplifier Dro's 6 mil. Thats 3 times the aluminum to help keep the butyl constrained and doing its job, but the extra aluminum also makes it less flexible and harder to get into tight corners.
Overall, RAAMmat is a great all around product, not the best available, but for the price it cant be beat, Damplifier Pro is an awesome product, but it is best used on wide curves and flat areas, but Second Skin has other products for that application.
I think I covered all the bases, also note that I havent used either of the products, this is all just based on research I've been doing to select a deadener for my truck, and 66mustang's car.