Something about the way these edges are rolled seems to lend itself to creating a very tubular shape to the unlined 7 fold. It's like the stiffness it provides combined with the repp twill used and the construction type make it easy to press into a shape where blades of the tie are very 3-dimensional. I may be wrong about the rolling contributing to this effect, but I like the result either way. I've not had any other ties quite like these two.
Why are hand rolled edges on a pocket square important?
Because they look beautiful. They also show that the maker decided to see the trouble of manufacturing the square in a slower way, just to get a nice roll. Mind you, that Borrelli edge is terrible and does them no justice, all flat with coarse stitches. Just compare it to that Hober edge and you'll see how quality separates one company from the others. I had no idea Hober offered such a strong, tight roll with such tiny stitches. It has likely taken much more time to manufacture, but the effort shows. This is fine work!