Kakashi having different MS techs than Itachi doesnt mean itachi didnt give him MS or UNLOCK MS.
I think itachi definitely gave sasuke his 3 MS techs, but i also think sasuke has 2-3 of his own as well, and tbh it shouldnt surprise anyone if sasukes MS techs are same or similar to itachis, afterall-they're brothers.
Kakashi doesn't have EMS, he has MS, ergo why kakashi said to itachi "how bad has your eyesight become?" because kakashi used MS and must have noticed his eyesight becoming bad.
Grafting the lens of the sharingan onto yours gives you EMS, hence why madara had the pattern of his own and his brothers MS on top of it, making a whole new pattern.
What i want to know is...Itachis MS made him blind, and basically he couldnt use the eyes LIGHT, he couldn't see that well.
Well in theory, maybe, kakashi can still use the MS even when fully blind and use his non sharingan eye to see the blackhole, and use the sharingan to simply form it.
Dunno.
I think Kakashi EMS + higher chakra reserve would make him very very powerful, maybe a little too overpowered.
His MS technique is one heck of a trump card, he can send enemies into a black hole, pretty heavy stuff.
Kakashi even managed to fight 2 pain bodies without directly using MS againt pain, he used it against pains attacks.
In fact when you think about it, Jiraiya had trouble taking out 3 standard pain bodies, and when 6 came along he got owned.
Kakashi had trouble taking out 2 bodies one of which was god realm-much stronger than the others.
Personally kakashi is on or very near the level of Jiraiya, for example sage mode speeds up the ninja using it, well pain didnt get fooled at all by jiraiyas speed.
Kakashi however planted chains which pain did not see.
Kakashi is logically therefore faster, and can handle his own against god realm.