Board Thread:Theories and Speculation/@comment-26889573-20151008053113/@comment-26537507-20151011165242

Georgio722 wrote: Sage Mode strengthens physically, and maybe Six Paths Chakra strengthens mentally? Hence Sasuke being the smart one. Plus, Sasuke can throw his black flames though.

That's actually just an advanced version of fire release. All Sasuke does is apply a shape transformation to the Amaterasu ^_^