Why does a just emptied Coke can make no noise, but a just emptied Sprite can makes bubble popping sounds?

I've noticed that when I drink a Coke the empty can is silent, but if I drink a Sprite the empty can makes little bubble popping sounds for a few minutes. Same holds for Pepsi vs Siera Mist. Carbonation level different? Something to do with caramel coloring or flavoring? Why does a just emptied Coke can make no noise, but a just emptied Sprite can makes bubble popping sounds?
It doesn't have to do with the flavoring, per se. The coke is more watered down with the various ingredients pumped into it, and Sprite is more simplistic compared to coke, and the carbonation is more predominant. The coke you had might have been a bit flat as well.Why does a just emptied Coke can make no noise, but a just emptied Sprite can makes bubble popping sounds?
you need to get a life