Naruto wins the regular scenario. Senjutsu boost means nothing when Naruto can still take his attacks with little damage. He just can't match him in CQC or match his offensive powers with his tails. Multiple uses of Flash BD=GG Sasuke. Same thing in S2, but Naruto will have to chip away at him w/ regular BD and Continuous BD. 3 is the same, except he'd have to chip away using regular BD but Sasuke still can't damage him nor can he outlast him, and the final scenario is the only one Sasuke comfortably wins in.
-Dominates Naruto's Avatar in CQC due to the Senjutsu boost.
-Chidori=Bijuu Dama, but far more focused. Senjutsu PS Chidori>>Bijuu Dama, but far more focused. Sasuke dashes at Naruto's Avatar and rips it apart in a single hit.
-Standard Bijuu Dama is tanked with negligible damage.
BSM Naruto at full power>>BM Naruto at full power>EMS Sasuke w/ Senjutsu and PS Chidori
>>BM Naruto w/ only Standard BD=EMS Sasuke w/ PS Chidori>EMS Sasuke w/o it.