Board Thread:Theories and Speculation/@comment-26331869-20150531125657/@comment-24924275-20150608034514

The same Mangekyo sharingan is probably because Shin Uchiha(son) is just a clone of Shin Uchiha(father) mixed with the DNA of the Uchiha and Zetsu clones. It would explain why he used him as a human shield, along with using his body for parts to heal himself.