I am afraid I am no help there. I know several ladies who quilt a lot, and they seem to use mostly Mettlers, don't know if it is better, or just works better in their machines, several of them have the more expensive Janome's. When I hand quilt, I decide whether to use one thread or another a lot by the effect I want. Maybe there is no right or wrong, if it works for you, maybe that is fine. I honestly don't know, but it sounds good.