When should the load( url, data, callback ) method be used versus jQuery.get( url, data, callback, type ) when making AJAX calls with jQuery?
First of all those two function is completely different. Load function work with selectors and loads the result of AJAX call inside selected group and callback is to handle the "oncomplete" event of the call. While the $.get function is more general and callback handles the success response of AJAX call where you are free to define any behavior you want. And you can find all this information just by looking at documentation and specification og Jquery framework.
Here you can find a good documentation.
load injects the data directly into the DOM. If you don't need this behavior, use get.
would only have to look at the jQuery code, as it is available for review. anyway all calls must reach the same method but respond in different ways depending on the need