* Sugar Content: Soda contains dissolved sugar, which lowers the freezing point of the liquid. This means the soda will be slightly warmer than water at the same temperature, making the ice melt faster.

* Carbonation: The carbon dioxide bubbles in soda can create more surface area for the ice to come into contact with the warmer liquid, accelerating the melting process.

Note: The difference in melting speed will be small, but it will be noticeable.