It was saying stronger than
Current Sasuke, not MS Sasuke.
By that i mean it's not counting the upcoming power ups for Sasuke, power ups and experienced he gained through the kage meetings....
After this very talk,
Sasuke got Enton, Susano and perfected Susano later on...
The Sasuke that fought Kakashi and Naruto after Danzo was much superior than the one who fought Bee..... haters need to stop hating at some point, shit is getting old.
MS was stronger than Naruto..... Naruto himself said so when talking to the rookies.... this is what Naruto responded when he was told that he could have defeated Sasuke because he was able to defeat even Pain when he attacked ;
You're wrong, i can't defeat Sasuke at his current level, Even he knew (HE aka Sasuke)