Stem stitch is a nice stitch for tracing and is used a lot in red work, I've noticed. Whereas backstitch has a flat texture, stem stitch appears a bit denser and raised.
In the photo below, I've used it on the dress form. You can see how it differs from the writing above it which is backstitch.
Here I've used it on the word "Sister". The word "friend" is satin stich.
This video will show you how the stitch is done.