Adult Gon mid diffs. Kakashi in Part 1 had a max of 3 Raikiri in any given battle and overusing his sharingan caused extreme exhaustion. Even Orochimaru was able to inspire surreal dread in this version of Kakashi. Make it Part 2 and he ofc wins, there's a mountain of growth for Kakashi in the time skip.
Kakashi with any version of Kamui > Adult Gon.