Often there is very little difference between the present perfect simple and the present perfect continuous. In many cases, both are equally acceptable.
To emphasize the action, we use the continuous form.
To emphasize the result of the action, we use the simple form.
Look at the difference in these examples.
When an action is finished and you can see the results, use the continuous form.
When you use the words 'ever' or 'never', use the simple form.