1. Do you find that you consistently put more effort into one of them (and those students) than the other ?
2. Is your teaching "style" and perhaps much of the material, the same between the two ?
3. If not, how does it differ in principle ?
4. Do you ever encourage these students of another instrument to also take piano lessons ?
5. Overall, do you feel that teaching two different instruments enhances your performance as a teacher in both ?