As compared to search options of Registry Editor an additional Case-Sensitive Search option is presented in ART. Duration of search is several times shorter. You can search in all copies displayed in the main window at once. You can search in Comparison window independently from searching in main window.
Results of search are displayed as lines containing the Keypath and, probably, the Name and Data. By double clicking on the line you can open a tree in the respective Key, if the Main Node shown in the line is not active at that moment, it is opened, which takes some extra time.
The only difference for search in Comparison window is that there is a new field Tree showing in which tree the object was found Deleted, Added or Distinction in data)