Is there a good way to verify the location of a part in subassembly with a part in another sub assembly?

Exmple:
I have a parent assembly, call it sidney, in that tree are twoidenticle sub assemblies, george and fred. If i swap out a part insub assy fred, can i use a tool to check what surfaces have moved.

normally i just lay the sub assemblies over each other in a parentassembly, select one and look for the surface tessalations(scrambled surfaces), where the parts intersect. Is there a betterway to do this?

thanksSolidworksAssemblies