What's this.. He doesn't have better summonings. Naruto summons Ma and Pa who reverse summon Toads from Mt. Myokubo. That's Gamahiro, Gamaken, Gamabunta and Gamakichi. 6 Toads with good synergy vs Sasuke Aoda and Hawk. More so, Gamakichi, Ma and Pa all demonstrated their ability to use SM. The snakes are by far outclassed and are killed within seconds.
Naruto doesn't use FRS outside of SM in the first place due to the harm it causes to his own body.
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Sasuke uses his Katon to counter Suiton from Toads.. Go on, you're on fire with this shitt. "If by any chance they use oil, it won't hit." Please dude, Go ONNNN! "then he can start a campfire which will somehow effect Naruto" Now he can prepare Kirin with a campfire. Last I checked it required an Uchiha fortress filled with Amateratsu to create the correct conditions, but now regular camp fires can do this.
Naruto isn't necessarily the one beating him, it's the toads that do it. Frog call paralyses snakes and Sasuke. 4 Toads stall long enough for frog genjutsu to occur. Gamkichi strength in SM will be too much for Aoda to handle. Hawk gets sniped by water bullet and it's not being countered with its own counter, fire. Sasuke loses low mid diff with Naruto's summons.