Aurifil is 2 ply 50 wt so thinner then 3 ply 50 wt. Masterpiece use to be 2 ply 50 wt but was changed to 3 ply 50 wt a few years ago. I like Masterpiece for piecing and Wonderfill Konfetti if I want cotton thread. I bought several cones of Maya 120 from Wawak and so far I am liking that too.