Obviously. You could also take it one notch higher and say that Jon is "the song of ice" and Dany is "the song of fire". They are the two most important characters.
But unlike the basic Dany who is the song of only one of the elements, Jon is both the song of ice and the song of fire. They are not equals. Jon > Daenerys.
But unlike the basic Dany who is the song of only one of the elements, Jon is both the song of ice and the song of fire. They are not equals. Jon > Daenerys.