Have you actually stepped into a Loro Piana store and felt their cashmere? It is otherworldly. I have some degree of experience in picking out high-end cashmere, telling the overpriced scams apart from the legit ones, and Loro Piana is definitely a noticeable level above the others.
I have skin that is hypersensitive to cashmere. Most high end cashmere itches for me, but not Loro Piana cashmere. There are significant differences in cashmere fiber length, diameter, etc.