MS Sasuke wins Mid-difference at most. Frog Song was used in the pipes and that too at nearly point-blank range. In an open space like that, it's literally useless. Not only that, it takes a LOT of while, a LOT of Sage Chakra, and would result in a LOT of needless time wastage which can be utilized to absorb Natural Energy, as the toads will not be able to do so in that time.
Manda overwhelms Gamabunta easily, as he had both Katsuya and him on ropes. He literally almost devoured Katsyua and Gamabunta and used bunta's katana nicely against him. Had it not been for Tsunade intervening, Manda would have eaten Bunta alive. It was a three on one fight, four on one actually, as Jiraiya used his Katon attack with Bunta's oil as well. His unhinged Jaw was as big as the entire Body of gamabunta. Don't take manda that lightly.
Sasuke should be able to summon any snake Orochimaru has or he himself has at any point in the manga, as he has a contract with them. Aoda should decimate Gamakichi as well, as the snakes have tougher bodies and can shed skin and go underground as well. Sasuke as a LOT of advantages with summons alone. He is also faster and has counters for FRS. Naruto shouldn't be able to use more than 10 of them before his chakra hits zero.
They are easily avoidable as Deva dodged and stabbed clones at the same time, and dodged, summoned down the bird-summon to change his trajectory, and Third Raikage - who has NO V2 Armour and is considerably slower than V1 Ae - wasn't even trying. Even great fireball techniques would do just fine against FRS. Even Hebi has a chance given the whole scenario.