Location is the position of the object from left to right and top to bottom within the parent window, frame, or dialog box relative to other similar objects.
Index Id is the order in which the object appears in your AUT relative to other similar objects. For Example, if you have 2 links, then index id=0 will be the first link and index id=1 will be the second link.
The answer to this question is entirely dependent on where the object lies, whether it is within the same parent or not.
