I think they're more or less even. I'm leaning slighty towards Kakashi's side because he has more firepower and genjutsu isn't everything, specially to beat Kakashi.
Without Ms there more or less even in strength, Both have Good Ninjutsu/Taijutsu and Genjutsu skills, Both extremely smart, Both Good with Clones/trickey.
Kakashi is not only good at genjutsu but he also outsmarted Itachi genjutsu.
I believe Kakashi has better strengh, taijutsu and ninjutsu.
Suiton > Katon
Raiton > Suiton
Doton > Suiton
Itachi has fast hand seal but Kakashi still keep up as he already proved it in part 1.
About pure speed they're about equal, but current Kakashi seems slighty faster imo.
Im leaning towards kakashi's side because kakashi already outsmarted itachi with a clone, this proves he can do it again and that he is faster in anallysis. Also chidori > any of itachi's elemental jutsus, also genjutsu wouldn't work since kakashi knows how to counter it