I don't know. I like them both, although I haven't tasted Aquafina in a loooong time. I'm shallow and like Dasani's look better so I usually get that if my first choice isn't around.
Doesn't really matter as long as it's clean and cold.Tbh both of them are better than getting water straight out of the tap (ESPECIALLY in older places).
Also,Nestle Pure Life and Crystal Geyser are good.