Thanks Constantine63.!!!
The thread there is more economical by the cone . Aurifil is 2 ply so not a strong 50wt and thinner then a regular 50 wt. That was explained to me by a rep. Masterpiece use to be 2 ply but now is 3 ply to be stronger. Long staple is better quality then short staple. Poly is poly but the manufacturing is different for spun or filament Thread is a whole other world to quilting and sewing.