Having spun all 3, here are my observations: they are much stronger than natural fibers, and they all spin similarly well both woolen and worsted. The PF brand “cashmere” looks a little shiny (like bamboo/soysilk). The Louet looks more natural but not exactly like an animal-based fiber. The “angora” was the most natural looking of the 3, as it had lots of little hairs sticking out to make it “authentic” looking. Once spun, they had similar levels of softness as singles (haven’t tried plying yet).