I think all Saske has to do is prolong the match till Jiraiya runs out of sage mode. So I think Sasuke takes this.
Base Sasuke and Base Jiraiya have the same speed classification, so they are at least close in speed.summons are restricted for both. Sasuke's heavily increased speed and durability with curse mark give him the win. Base Sasuke>Base Jiraya in speed so while i believe Jiraya's sage mode is slightly higher than Sasuke's curse mark overall he still is going to be the faster fighter here especially with 3T sharingan backing it up
Base Sasuke:Sasuke high diff. Superior speed, superior Taijutsu due to Sharingan and his physical capabilities, superior Genjutsu as he's capable of manipulating Jiraiya's summing, superior summoning Jutsu, and arsenal overwhelms SM Jiraiya.
Slap yourself bro.Sasuke takes it.