First off, was the fact that Jiraiya was unable to get Orochimaru to stay in the village, i can't remember if they fought but if they did, jiraiya lost as Oro still left. This would suggest Jiraiya is stronger.
You mean it would suggest orochimaro is stronger and not Jiraiya,right?
Anyway,this would be a close battle since they are close to being equals,and neither person could kill each other off(when they met),but i'm picking orochimaru because he was "the chosen child".It was said that he had a talent that only came in a every few decades,he rivaled hiruzen when it came to ninjutsu,and if he stayed on the right path he would have becomed the fourth hokage.He defeated
two kages,created his own village, which was stronger than one of the five big villages,and he pretty much experimented on every major character.Even the cunning madara was surprised about how much orochimaru knew,and finally he managed to survive being hunted from both konoha and akatsuki.All this often gets negleted because he got owned by itachi.
When it comes to the actual battle,I would say that we didn't see much of orochimaru's abilities,due to his handicap,but what we saw was impressive.He can pretty much tank everything jiraya throws at him,and this was proven when all he got was an cracked face when tsunade landed one of her killer punch,also the time where he toyed with the fourth tailed kyuubi.
Edo tensei is one of the most overpowered techs in naruto,and orochimaru has shown he can keep strong will'd people like harishima and tobirama under his control.Imagine folks like muu and the 2nd mizukage being summon,hard to seal what you can't see.
His sword can nearly pierce everything, and manda was showned to be stronger than gamabunta.Ma and Pa will give anyone trouble, but we have yet to see what oro's hydra is capable of,which was said to be a dragon god compared to manda.
tough battle but oro takes it