Itachi had the Izanagi and not Sasuke, so Itachi implanted amatersu inside of him.
Madara was said by Black zetsu that he put it in his eye himself. In order to put something inside, means that you did not have possession of it in the first place. Itachi said that before the uchihas were suppose to win battles without fail.
So it's an empty concept on how this transcript is coordinated, but we all know that it is not frequent as the real use of izanagi.
It's a topic that is viewed for many speculations, but we know that there is a difference.
My guess is that he either found a dead senju and sealed (transcript) his chakra into his right eye.
