This is hilarious.
Everybody's opinions are diametrically opposed on these blades. Maybe it depends on your beard density and thickness of your beard, or something. Maybe everybody who posts an opinion should state what kind of beard they have; PERHAPS more sense might be made of it, and you could make a choice based on your beard. PERHAPS. Or, it might be more confusing still.
I have a fairly dense beard with really wiry hairs (about 50% gray) that is pretty tough to shave off. For ME, the Astras were actually better than the Yellows. Yellows tug, and Astras glide much better.
FWIW, I think the Russian Greens are slightly better than the Astras, and the Kais are about the same as the Russian Greens.
Randall. BOTOC, Excalibur, Hot Sauce Pepper Heads Club