When I was learning about classification models, it came to my mind that if there is any difference between "categories" and "classes" on the basis of machine learning terminology? If there is no difference then why do we say classification models, why not categorization models?
As noted by @Emre in the comments:
"Same thing. Just call it classification; it's the more common name for the task."
Although there is no difference with respect to machine learning, this paper may provide another perspective in detail.