I don't know, Orochimaru took a hit like it was nothing from the 4 tail naruto while it almost killed jiraiya. I just think Orichimaru is a whole level above most.
That's only because they have different strengths.
Orochimaru has endurance and the power to basically rebirth himself
Jiraiya, for the most part, excels in offensive capabilities
To say that Orochimaru would beat Jiraiya merely by that comparison alone is void.
I believe Orochimaru would win, but just barely. Jiraiya is no one to underestimate. He'd give Orochimaru a good beating before he goes down
base Oro (w/o summons)> Base Jman
summons included Oro>Jman, since snakes>toads
Oro>Jman SM
Oro w/ Edo>>>>>>>>Jman SM
I'd give this fight to Orochimaru too, but I wouldn't exaggerate it like that