My opinion: b50 is like rubber. I like it for stitching some things, like leather handles once and a while. When you pluck a bow with a b50 string you can hear the rubbery b50 soaking up the energy. When you use a low stetch material you can tell it is shooting energy off of it because it doesn't stretch, makes a higher sharper pitch. I can anyway, as half-retarded as that sounds. It is cheap though, so I guess I can't complain too much,
. I do like linen, it is just a fun material to use. I like making 3 plys of linen, they feel so good in your hand with no serving. And look sharp on a bow. Good performance too, low stretch. I use ff most of all though.