I have found out Itachi on the original naruto is 18 yrs old, and on shippuden 20. Sasuke was 12 in original naruto, so that tells us there is a 6 year difference between the two. But in the flashback when itachi was a good guy and lived with little sasuke and his parents, before wiping out his own clan, he looks like he is 16.. But sasuke looks like he is 6 years old, and as there is a 6 year difference, then itachi would have to be 12, but he looked much older than 12.. So what do you guys think..