What is the difference between a colon cancer and intestinal cancer?

Depends: A colon cancer is a cancer of the large intestine. An intestinal cancer could be located anywhere in the small or large intestine. But small intestinal cancer is quite rare, so i suppose that most "intestinal" cancers would be located in the colon statistically.

Location, Incidence: Colon cancer arises from a site involving the large intestine commonly called the colon (ascending, transverse, descending, sigmoid). Intestinal cancer usually refers to small intestinal cancer that arises from the duodenum, jejunum or ileum. Colon cancer is much more common compared to cancer arising from the small intestines which is considered rare.