In my opinion I think jman is stronger. I mean let's look at strengths by both oro and jman disciples.
jman
Nagato- was the somewhat leader of akutski and destroyed a damn village with one technique.
He left nagato when he was about 10,he didnt know any of nagato's rinnegan techs,dont give me crap here. All nagato did with his rinnegan was him,jiraiya had nothing to do with it.
Naruto- plot no jutsu he will defeat any enemy that comes before him and he will be a hero of the manga.
He taught naruto rasengan,big ball rasengan and summonings,he had nothing to do with sm,km or bm.
Oro
Saskue- defeated is own master oro ( don't give me that bullcrap that oro was weak. Just before that happened oro punched kurama in the face when he was fighting naruto and Yamato and Sakura. To punch the kybii in the face is notorious but then ends up getting defeated by sasuke... Seriously...
He couldnt move at all,his body had reached it's limits,it was beginning to reject him when he fought naruto,and he was on the verge of being rejected by sasuke. Didnt oro beat sasuke still?,and could have killed him if he wanted,but chose to take his body instead?.
The guy with the glasses- he lost to itachi even though he had perfected 2 of oro technique... What a waste of time...
If itachi had fought him alone,he would stomp him with ease,he could have ended edo tensei if he wanted,he could have summoned other edos to fight him. Sasuke distracted kabuto long enough for itachi to use izanami,if he wanted to kill sasuke,izanami wouldnt have happened,so dont talk crap. Itachi dies twice in that fight. Also wasnt nagato his puppet?,isnt he using a tech to fight the entire shinobi alliance?
Jman wins...