After nearly 30 years of knitting,,,, I now prefer nylon,,, I love them 10 z,,, in my opinion they beat spun poly hands down,, there just stronger,,,,, and when it's snowing there's nothing better,,,, that poly freezes up.....
I've got all sorts in my net bag,,with most now being 10 z,,,,all the poly is at the bottom, and hardly ever gets used,,,