Lol, the same ol' deluded fools once again much..? EMS does not grant you extra stamina ._.
You say that Sasuke would last longer in a Susano'o match. That's not true. From what we've seen, Itachi's stamina is relatively good had it not been for his sickness. He wouldn't go blind after 1 fight, so yeah, Itachi's Susano'o would overpower Sasuke's due to his weapons - Which Sasuke doesn't have.
Secondly, Sasuke's Tsukyomi and Amaterusu are equally ineffective against Itachi as it is the other way round.
Itachi's much better overall, so yeah. Though it'll be a close fight. Itachi knows more about the Uchiha's and their overall workings of the techniques, such as - Izanagi and Izanami, unlike Sasuke. Itachi, even if Sasuke possesses more firepower, Itachi's much calmer, smarter, and would play out Sasuke, with a plan.
In conclusion, your statement is false. It's not Sasuke EMS > Itachi definitely, it's a 50-50 at best.