Both are equally as hydrating and will quench your thirst. However, the liquid found inside young coconuts has sodium and potassium which are essential electrolytes for rehydration after you’ve taxed your body. Coconut water works as well as any sports drinks out there. Even better, due to the fact that there is nothing artificial and less sugar in most coconut water brands.
What I did find was that coconut water replaces bodily fluids better that were lost from sweating during a 60 minute workout. Keep in mind that this beverage has up to 60 calories per cup. So if you are just thirsty and you have not been sweating, water is the way to go!
Stay hydrated and keep sweating!!