Click Compare
Geometry 
on the Utilities toolbar.
In the dialog box, select Bracket_A.sldprt in Reference Document.
Select Bracket_B.sldprt in Modified Document.
Use the Compare Geometry utility to compare the faces and volumes of two similar parts. For example, if you have an original and a modified version of a part, the Compare Geometry utility analyzes the geometry, then groups the results according to unique or modified faces and different or common volumes. The results appear in the graphics area and in a tree-structured format, so you can easily see the differences in the two parts.
Now you compare the geometry of the two brackets.
Click Compare
Geometry on the Utilities toolbar.
In the dialog box, select Bracket_A.sldprt in Reference Document.
Select Bracket_B.sldprt in Modified Document.
