My stitch in the ditch foot has a built-in walking foot function, so I haven’t had to choose between them. You would want to use the stitch in the ditch foot when you need a guide to keep your stitching line exact, but sometimes when you’re stitching on a thick set of layers, it would be more important to have the walking foot function to keep the layers feeding through evenly, if you have to choose between the two. You can always guide your stitches by eye (some people are better at this than others), but you can’t always make the layers of your quilt feed through evenly without a walking foot.

Thank you so much! It’s working perfectly, I’m following your directions