The difference is in the technology used to print the two. We usually refer to the regular photo prints as lab prints since they are produced by modern digital photo printers. The prints on canvas and art papers are produced with high end inkjet printers. For a more detailed explanation, please visit the following blog post:
Order Giclee Printing on Canvas
Printed using some of the highest archival standards in the industry, your photos or artwork will last for decades to come.