It is hard to compare not knowing the type and weight of the threads. I do like cotton aurifil 50 for piecing a lot. I have gotten a couple of spools of Wonderfil and I haven't liked that as much. However, I didn't like the spool of Wonderfil cotton 50 weight Konfetti as much as the aurifil. I think it is because of the shape of the large spool. And I really did not like the All purpose polyester Designer I got as it seemed really soft and floppy. (got that because it was the right color for binding I was using). I would suggest just a spool of each and trying them. I would however use them again as long as I have them.