First things that need to says is that databook stoped at chapter 409
so about 160 chapter ago !
while itachi died ,kakashi did great progress that have not been include in databook.
According to the manga and old databook that stoped at chapter 409 :
genjutsu : itachi
databook --> kakashi : 4 itachi : 5
kakashi and itachi can use genjutsu without sharingan but at lower level than sharingan genjutsus,without sharingan i'll put itachi a few above , because of his 2 finger low level genjutsus Dusk Crow Genjutsu and Ephemeral.
ninjutsu : : kakashi
databook --> kakashi : 5 itachi : 5
affinities can't be copied so they both still have all their elements,
itachi can use katon and suiton ,has a good fireball jutsu and can use housenka as well and a good fast suiton attack,
kakashi can use suiton,raiton and doton so more jutsu than itachi and got advantages to counter any itachi's attack.
people keep saying he only has chidori and forgot that he also got kage bunshin,Summoning Tracking Fang,raiton kage bunshin,raiju hashiri,raiden and raikiri and some suiton and doton impressing jutsu like suiji heki and doton shinju zanshu etc...
chakra : kakashi
databook --> kakashi : 3 itachi : 2.5
thread says no sharingan, kakashi will a better endurance than itachi who has 2.5 .
strengh : kakashi
databook --> kakashi : 3.5 itachi : 3.5
they're equal but the fact that kakashi can use gate is largely enough to put him above itachi,it's clearly stated only for the 1st gate
taijutsu : draw
databook --> kakashi : 4.5 itachi : 4.5
they're about equal ,personally i prefer kakashi's style because he passed all his life to fight with gai to perform his taijutsu.
speed : itachi
databook --> kakashi : 4.5 itachi : 5
itachi is a bitfaster than kakashi according to the last databook ,i believe that the actual kakashi is about at itachi's speed,that's not in databook which stop at chapter 409 but manga stated that nagato and tobi rekognized his speed skill and he was able to save naruto from tobi in the last second before that tobi kill naruto.
Intelligence: draw
databook --> kakashi : 5 itachi : 5
they are both geniuses, suspecting if either one was smarter would be completely ignorant and incompetent. Itachi didn't plan anything, and he failed anyway's. Kakashi's just really smart, and has good intellect. And Itachi is basically just a boy Genius who can throw Kunai good. Itachi is a smart ass, and is loyal, Kakashi came up with a technique of his own at the age of 13 that is just as bit as good as Rasengan.
finally kakashi will win that fight but itachi will put a good fight.kakashi is just better than him without sharingan and he didn't stop to increase his skill contrary to itachi who died.