nope, Sasuke's potential was compared with Kimimaru's, or was it the power of the seal? but anyway, no one ever said that Sasuke, as he was before lvl2 seal, is similar to Kimimaru...


however, talking about similiarities..
Orochimaru said "if Itachi was with us, the invasion to the leaf would have gone well", and he also said "if Kimimaru wasn't ill, then the attack on the 3rd would have been easy", doesn't that imply that an healthy Kimimaru is about the same strenght as Itachi?