TBB IMO, Cus' if Yata mirror can deflect this itachi would be piratically GOD, and kishi woudnt do that.
The main idea is Yata mirror can deflect it or TBB can destroy yata mirror I think and yes you got really good point, Users Chakra reserve is playing an important role too. This is no Itachi VS Naruto.
I am not into Naruto vs Sasuke.
What I am saying is, Susanoo will be thrown off far distance before the mirror actually contacts and deflects TBB and since Yata mirror comes with Susanoo and various factors affects Susanoo including User's chakra, its not just Yata mirror vs TBB...:shrug:
It kindof is. Itachi used the yata mirror to deflect multiple explosions, kirin, and a direct attack by sasuke's sword with only about 1% chakra on his deathbed after the disease had destroyed his body and was completely blind.
kishi said the mirror blocks everything case closed
Yea using the mirror doesn't use chakra, using Susanoo does.