Syllabus for Tall Stitches Class specifies Red Heart Soft rather than Super Saver

I just noticed that the Tall Stitches of Crochet syllabus calls for Red Heart Soft yarn whereas both project patterns (pillow and scarf) call for Super Saver. I had missed this until I had a student that purchased the Soft for her class last night. At first I thought it was nicer for the scarf however it seemed very splitty as she was practicing the various stitches which of course entailed a good bit of unraveling due to missing stitches as well as difficulty inserting her hook in the stitches.

What has been other people's experience?

Thanks,
Marian