The reason why Mexican Hot Cheetos are better is because Mexican Hot Cheetos have a more complex flavor profile and a deeper spice level.
Mexican Hot Cheetos use a wider variety of spices and chili peppers when compared to the American version of Hot Cheetos.
The American Version of Hot Cheetos can taste more one dimensional and vinegary than Mexican Cheetos and many people find that Mexican Cheetos have a better texture and crunch.
Basically Mexican Cheetos are tangier and spicier than regular Cheetos and use more seasoning.
Mexican Cheetos also have a more layered and nuanced spice when compared to the American version of Hot Cheetos as a result of the wider range of chili peppers and spices used in the Mexican hot Cheetos.
The Mexican version of the Xtra Hot Flamin Cheetos are some of the best and have more depth and flavor than the American version.
It also has a more earthy and complex taste and a greater variety of spices.
The American Cheetos taste more vinegary and can be a bit spicier to some people.