What is more healthier Cocacola OR Canada Dry?!
Probably Canada Dry, less syrup and caffeine.
I doubt either of those is healthier than the other (assuming by Canada Dry you mean their ginger ale). If you want something healthier you might look for a more expensive ginger ale. There are quite a few out there, and they have a considerable amount of actual ginger.
diet coke, diet canada dry
canada dry because it has no caffiene