Coke zero and Diet Coke are pretty much the same product except Coke zero is artificial sweeteners on steroids as it uses aspartame just like Diet Coke plus another one.
The main marketing reason for coming out with Coke zero over 15 years ago was men associated diet soda with women so now men can have their Coke zero without the diet word in it
“While Diet Coke uses aspartame as its sweetening agent, Coke Zero uses both aspartame and acesulfame potassium, also called “Ace K” or “acesulfame K.”
https://www.healthline.com/nutrition/coke-zero-vs-diet-coke#nutrition-and-ingredients
One thing I would call these sodas are literally chemical drinks
Pretty much lab created chemicals and water.
The main marketing reason for coming out with Coke zero over 15 years ago was men associated diet soda with women so now men can have their Coke zero without the diet word in it
“While Diet Coke uses aspartame as its sweetening agent, Coke Zero uses both aspartame and acesulfame potassium, also called “Ace K” or “acesulfame K.”
https://www.healthline.com/nutrition/coke-zero-vs-diet-coke#nutrition-and-ingredients
One thing I would call these sodas are literally chemical drinks

Pretty much lab created chemicals and water.