Okay so Neji attacks Sakura. Sasuke is pissed.
Curse Mark + Sharrigan.
It seems to be potent when Sasuke first used it, because of his rage, So I'd say him, Neji even showed slight fear.
But he had rotation and at that point all Sasuke had was taijutsu.
Neji should take it. People tend to underestimate how much naruto and sasuke grew during that 1 month gap between the 2nd and third stages of the chunin exams
By portrayal neji wins medium difficulty everytime since he noted that sasuke was a stronger enemy than he could've imagined due to his chakra , but its meaningless.
Just ask any version of Sasuke even if he was still a mere toddler, they still believe in him :lol
so only those who can give a truth answer like me can be taken serious :lol
answer : Neji win low diff