|AJAX is a powerful tool which cannot use HTML since it is a simple tool and it can not reload the page after it is once loaded.
||JQuery is a light weight language that focuses the interaction in the HTML elements.
|AJAX is a combination of several technologies such as CSS HTML DOM and many more. In combination with these technologies AJAX provides new functionalities.
||JQuery cannot provide a new functionality by combining with other technologies.
|AJAX should be accessed in a proper procedure to retrieve data from the server.
||JQuery can be accessed through front-end therefore JQuery does not require understanding of the complete procedure to setup a page.
|Heavy usage of AJAX often leads to the server overload due to more number of connections created.
||There is no chance for overload of server while using JQuery since there is no such heavy usage in JQuery.