David C has the voice for the modern/young folks music and has more maturity to be able to handle the win. So for that reason I believe he should win.
David A has the better voice technically but is very young and I don't think he would be able to handle the win as well as David C. David A also has a strong "stage father" to deal with and seems like the type of kid that would go along with whatever dad wanted which may or may not be a good thing. Once he has aged and matured a bit, this boy is going to dazzle the world and do very well for himself but for now he should not win.
David A has the better voice technically but is very young and I don't think he would be able to handle the win as well as David C. David A also has a strong "stage father" to deal with and seems like the type of kid that would go along with whatever dad wanted which may or may not be a good thing. Once he has aged and matured a bit, this boy is going to dazzle the world and do very well for himself but for now he should not win.