1. A method for comparing query-related objects, comprising: receiving a first plurality of query-related objects for a first user; receiving a second plurality of query-related objects for a second user, wherein both the first and second plurality of query-related objects include objects of different object types; comparing the first plurality of query-related objects of each type with the second plurality of query-related objects of the same object type to determine a degree of similarity between the first and second plurality of query-related objects of the same object type; and issuing a notification of the degree of similarity.