I don't know, i've seen alot of people say Itachi could beat Sasuke, but really?
1. Tsukuyomi is useless and easily countered by Sasuke's Mangekyou.
2. Sasuke has EMS and can outlast Itachi in a Susanoo duel, quite comfortably actually, because Susanoo takes a huge toll on Itachi.
3. Sasuke is more versatile.
4. Sasuke is much better at Enton than Itachi and can easily get rid of Itachi's amaterasu. Itachi strains whenever he moves a little bit, which is bad because Sasuke can easily spam amaterasu.
5. They are both smart, Itachi will not make Sasuke look like an idiot.
I really do think Sasuke > Itachi. What about you guys?
You have posted some good point's but Sasuke beating Itachi 9 out of 10 is a stretch imo, why...
1-Sasuke can counter his Tsukoyomi but it will take a little time to do so, and while he is busy countering it he is vulnerable to outside attacks, since Itachi can hit him with whatever Jutsu he want's, so it would be wise for Sasuke to avoid Genjutsu all together.
2-Although you are somewhat right about Sasuke outlasting Itachi in a Susanoo duel, you are forgetting that Itachi has a very good chakra control, remember the fight between Sasuke and Itachi, Sasuke had Orochimaru's power's And curse mark lvl2 (which increases his chakra reserves) yet a sick Itachi who was almost on his death bed outlasted him in chakra.
And current Sasuke does not possess curse mark so his chakra reserves are lessened then before, he can use his powers easily and more often due to EMS is true, but he will not be able to outlast Itachi due to his excellent chakra control, and even if he manages to prolong the battle he can not actually hurt Itachi due to his Susanoo having 'Yata no Kagami',
on the other hand Itachi only need to touch him with Totsuka and Sasuke is a goner, i do not know if Totsuka can pierce through Susanoo v3 but if it can then Sasuke will be defenseless.
3- i think they are more or les equal in this department, but Itachi has more experience and more dangerous skills then Sasuke.
4- Sasuke can manipulate Amaterasu is correct but He can not hurt Itachi until he puts down his Susanoo, and I do not think that Itachi is foolish enough to waste Amaterasu on a person who can control it perfectly.
5-If it is a death match Itachi will not think of him as a younger brother, and Sasuke easily loses his cool in a fight but Itachi has shown the ability to keep his cool in the most dire situations.
Take note that Itachi can perform Izanami, which Sasuke has no viable counter for and if he only try to use Izanami he can turn his Susanoo on for the time it takes to prepare it, and there is nothing Sasuke can do to stop it.
So i will give it a 40\60 in Itachi's fevor until Sasuke shows some new power's and proves that he can Keep his cool in a battle when Emotion's are running high.