nah, i've read both manga and watch both anime. Illusion technique only works if the prey make eye contact with the caster or technique. Since Itachi can make genjutsu only with his finger and no doubt, with eye contact and with sharingan to read other people mind and thought, surely he would not stupid enough to face Aizan directly so he may use kagebunshin. Now you could guess who have the upperhand. This is my POV. Itachi rules...