sign, symptom, or diagnosis, it is appropriate to assign both the V code and the code describing the reason for the non-routine test. 18
The difference is in the types of non -nutritive sweeteners used. Diet Coke has aspartame while Coke Zero has a mix of aspartame and acesulfame potassium. The beverages have different levels of sweetness and off tastes (I.e. high levels of aspartame have a metallic taste) as a result.
Because the chemicals in diet coke react with the chemicals in the mentos, Normal coke has the same chemicals that mentos has, that is why you need to have a positive and negative to react, Normal coke and mentos is positive and positive.