too many crackheads in here..if it was neiji vs sasuke without seal then we have a much more arguable topic than neiji vs sasuke w/ seal. like mutachi said, it's not even a question. look at it this way, sasuke has the most powerful seal (next to kimi) given by orochi. neiji barely won against the 2nd to last of the sound 4. sasuke at level 2 is greater than any of the sound 4 at level 2. sasuke would decimate neiji with level 2. and if this fight were to actually take place, do you see neiji beating sasuke (level 2) with a simple chakra flow blocking attack. that'd be the most anticlimactic finish i'd ever see.