Effect of hierarchies in geometry placement?

Hello everyone,

I have a naive question regarding geometry placement in GEant4; please pardon and point me to relevant sources if it has already been answered in the documentation.

I have 2 different physical volumes having separate logical volumes, A and B. I am trying to place B inside A.

Case 1: Mother volume of both A and B is the world volume?
Case 2: Mother volume of B is A. Mother volume of A is the world volume.

Are Cases 1 and 2 equivalent in terms of the physical processes, interactions, and scoring in the Geant4 ? Or they can lead to physically different results.

Thanks a lot

Place logical-B in logical-A, and logical-A in logical-World.

case 1 will give overlap

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