No, list and listing do not necessarily mean the same thing. A list is a series of things that are similar, or at least connected in some way. A listing is one entry in a list. (You'll also find a definition of listing meaning a list but I picked the contrasting definitions to make the point.)

The nouns “listing” and “list” are not synonyms. “List” describes an ordered set of items. “Listing” describes the process of creating a list. Use “list” when you want to describe an ordered set of items. Use “listing” when you want to describe the process of creating a list.