That's exactly what I wanted to say. Both Cola and Pepsi are too damn sweet. On the rare occasion at the right temperature and amount of thirst on my side I can drink a 330ml bottle and actually enjoy the taste. But most of the times it feels like too sugary so either I drink just a small glass and lots of water afterwards or just mix it with carbonated water directly. Bottom line: usually feels too sweet for me.
Like coffee: I like a hint of sweet in my espresso, but Cola is like dumping 4-5 spoons in a small cup of coffee. Becomes sugar syrup and that's all one can taste anymore.