They're equal overall, like skills and such but Naruto is ahead in terms of speed,, stamina, chakra reserve and fire power. Sasuke does have the sharingan to help his analyzing skill and smart in his own right but Naruto have has his own unique fighting style which aid him in fights and have Kurama to help him with strategies as well. And Yes tbb can kill Sasuke from the power we seen. All Bijuus are about the same size, but full Kurama's tbb was no where near the size of the tbb BM Naruto used against the 5 Bijuus. Their tbb made the 5 Bijuu look small in comparison so Sasuke can be killed by tbb.
Yang Kurama even took leadership of the group from Kakashi while they were fighting Obito and Gedo Mazo, he's centuries old and have a lot of knowledge. Naruto already made 12 KM clones when he first enter the war and wasn't even at full power cause he was training before, each clone had 1/13 the power since there was 12 clones plus Naruto. 1 KM clone beat Muu and the 3rd Raikage with minimal help so how would Sasuke fare against 13 KM Naruto's who would sense him and is faster than him?
It's true Naruto hasn't master his shunshin compared to Minato (Which is his top speed that is like a yellow flash) as Yamato said but he shown that he can at least move on A's speed when Naruto thought to himself that A can keep up with him in that mode and that he has to go faster and Tsunade who was amazed that Naruto can keep up with A's speed. Naruto used his full speed when A used his full speed which Naruto dodged. Sasuke couldn't react to A's speed when he had MS but now he has EMS. Trouble is that there would be clones all moving at that speed which would make it hard to track since a weakness to fighting an Uchiha is fighting with more numbers (have to be close to or on the Uchiha's level) and get behind the Uchiha to attack.
Also Sasuke usually use up to Final susanoo first as we seen which is open from ground attacks which Naruto/Kurama have done before to other opponents. Both are still new a their powers so still need training.
