No, he hadn't at all at that point. Even if Sasuke actually overpowered the Tsukuyomi, defeating one technique does not mean he was stronger. In the end, we know Itachi was deliberately trying to die that fight, but not before forcing Sasuke to spend all his Chakra to lure out Orochimaru. In other words, a sick Itachi, with low stamina and almost no eyesight, fought to draw out the battle against a healthy Sasuke, who had the cursed seal to enhance his Chakra reserves. Even then, Itachi held back.
EMS Sasuke surpassed Itachi. Rinnegan Sasuke eclipsed Itachi. However, Hebi Sasuke was a tier or two below Itachi.