I prefer the Guttermann but have used C&C as well as Americana brands. Americana is a much heavier weight thread than either of the other two and can be a bit difficult to quilt with depending on your batting. Not impossible, but doesn't 'glide' quite as well as the others. I find the C&C to be a lighter weight than the Guttermann and hence find that it does not show up quite as well. But bottom line for me is finding the color I want! Sometimes I have to go with one of the least preferred brands to get the color I want for the project I'm doing at the time.