It's coke because it has more acid and sugar
Mostly the sugar load ... especially as its in syrup form and sticks to the teeth after you're finished. It is also acidic, which eats away at the enamel coating. Coke the beverage decays teeth...
Mountain Dew because of its acid.
this is because it has more acid in it. Coke or any soft drinks are acidic.
its mountain dew because it has the most acid in all of the sodas