I was checking out an article on shaving 101. It claimed Reds are not good for guys with heavy growth. I find that odd because even though I do not have a heavy beard it is still coarse and find they are decent blades. They recommend Crystals though which I have tried and ouch The Burn!!!!!! I guess this just shows how suggestive blades really are.
There are many blades coming from the same factory/family. Best to try a sample pack, you never know what will work for you, especially with blades.
I realize that , especially now, I just do not understand how they came to the conclusion of the right blades for skin/beard type. Different blades work differently with different razors , not to mention Prep and Cream/Soap. I just think that there are way to many variables in a shave .
I see your point. I don't know how anyone can draw any conclusion about blade & present it as "objective."
I got a very smooth shave with the Israeli Red Personna. One of my favs. The Crystals were harsh in comparison .YMMV LOL I have used blades and found them unimpressive. After reading great reviews, retried the blades and draw a different conclusion . My Own Mileage varies from time to time. Lol