Abu,
I am as certain as I can be that they should be identical twins in every respect. I do remember laying mine out one on top of the other and although they were not quite clones, the difference was slight - attributable to the difference in the base angles of the arms - easily corrected using elbow grease.

I understand that you will focus on build rather than document, but I would still be very interested in photos of any kit bashing initiatives - based on your other threads that would be good for the community at large. Is a Pup, or Strutter on the cards?