Don't worry about too many options since they are mostly identical.
Another consideration you may or may not have thought about. When I started teaching I had a full time (non-aviation) career. Most of my students did too and (aside from "Midlife Flight," I marketed myself as the "CFI with a schedule as bad as yours." Once a week lessons if the weather cooperated. Mayby a second if there was a break in both our schedules at the same time. So I was less concerned with the syllabus itself than I was with good study material for my student that would help keep their head in the game. Sportys and King both have online (back then, DVD) courses that are not only "written test prep" but follow a flight training program, lesson by lesson. Student can prep for the next lesson with the course, take the lesson with me, and then review what we did with the course. That's what led me to Sportys and their syllabus to begin with.