Question on Navision Commerce Gateway

Is the Commerce Gateway of Navision equivalent to the E-Connect for Great Plains? Does these two have the same purpose in terms of its functionality and purpose? And also, Can i have a background of the Commerce Gateway and when is it usually used? thanks![8D]

Great Plains E-Connect is a SDK toolkit for developing web interfaces to Great Plains. It would compare more directly to Navision’s User Portal and the newer employee portal. Commerce Gateway is Navision’s interface to Biztalk Server.