But honestly, let's compare arsenals.
At that age, Konohamaru had:
Rasengan
Slightly above average taijutsu
Above average battle analytics
Above average speed
Sexy jutsu
Above average chakra
Shadow Clone Jutsu
His most impressive feat was taking down the Naraka path.
Sasuke had:
Katon: Goukakyo no Jutsu
Top ranked genin Taijutsu
Top ranked genin Ninjutsu
Above average Genjutsu
Above average speed
Genius battle analytics
Above average chakra.
His most impressive feat was nearly succeeding in retrieving a bell from Kakashi, who, I have to say, wasn't going all out in the slightest. He was forced to be more serious than with Naruto, however.
Regardless of not being the fastest path, Naraka was indeed a path with heightened abilities. The fact that Konohamaru was able to dodge most of his attacks and ultimately outsmart him was no minor task.
But...
Sasuke simply has a better arsenal at that point. I say Sasuke, mid diff.