If we're going by age then 16 year old Sasuke zero diffs 21 year old Itachi and 30 year old Kakashi a hundred times over
And Kakashi at the same age as Sasuke was a Jonin, no?
Young Kakashi is working young Sasuke
Young Kakashi is working young Sasuke
Itachi and Sasuke can be measured by who was the bigger natural prodigy since the conditions are similar. And it's Itachi if you ask me.