Its clear his hand-speed is faster. Not his footspeed.
And itachi doesn't have the stamina to perform all of whatever jutsu's he isn't even implied to possess. From the non-genjutsus both show, kakashi takes this especially if he can use kamui as well.
Beat them both with non-ms genjutsu, something that won't affect kakashi since he has a full sharingan and MS.
Nope, without genjutsu, base itachi is outgunned by kakashi, and kakashi also has his MS in this fight.
Actually in the data book kakashi's foot speed is 4.5/5 same as sasuke. Itachi is 5/5 and if you watched the itachi vs sasuke fight, not only was he able to avoid all sasuke's kunai assualt he was able to create another clone, which then dispersed into a clock of crows coming sasuke's way. Also he blitz past sasuke before he kicked him and used tsukuyomi. This is the itachi before he used the ms.
There is no way in hell kakashi is winning. Also you say kakashi has the sharigan therefore genjutsu wouldnt affect him. Sasuke has more mastery of the sharigan not only because he is an uchiha, but also he supressed the fox's power with it, something kakashi cannot do. Even tobi commented on his use of the sharigan against deidora and not even this sasuke could dispell itachi's genjutsu, not to forget sasuke is also a genjutsu specialist.
Even without ms, itachi takes this. Even say pre ms sasuke would beat kakashi.
Look at how a 30% itachi clone did to kakashi,naruto,chiyo, sakura and he couldnt use his ms because the clone didnt have enough chakra