LadyAg

I have been looking at doing invisible machine applique with clear polyester thread for turned edges. In researching the correct needle sizes, bobbin thread weight, tension settings, etc. it seems that most quilters either prefer the blind hem stitch or the zig zag stitch, both stitches reduced to small widths and lengths.

Other than the appearance, is there any particular reason for using one over the other? Does one hold in different situations better- i.e. straight lines vs. points and curves? Is it because quilt show judges like one stitch better than the other?

Thanks for your help!