The only difference is the diet version has sweeteners where the regular version has natural sugars. The regular version is more sweet. I have a hard time finding cherry coke as it is, and I have had cherry Tango on occasion. When it comes to pop, soda, and the likes, I drink Lilt and Tango. Diet is for sissies and fat people. My metabolism craves sugar. So yeah, I always go for the regular version.