For example, beta decay of a neutron transforms it into a proton by the emission of an electron, or conversely a proton is converted into a neutron by emission of a positron (positron emission), thus changing the nuclide type.
Diet Coke Plus - Diet Coke fortified with vitamins. Diet Coke Sweetened with Splenda - diet Coke with splenda instead of aspartame. Diet Coke with Lemon/Coca-Cola light with Lemon - a lemon flavored diet Coke. Diet Coke with Lime/Coca-Cola light with Lime - a lime flavored diet Coke.
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.