OK....you can't go by the clouds because Sasuke and Naruto both have clouds in their background. When they clash we are looking at the clouds from a different angle then before they attacked so nobody can say which statue they are over. Yes, Sasuke's eyes power doesn't increase his physical speed, but it does have him read movement better. The fact Sasuke, with eye power activated, couldn't blitz base Naruto proves have much powerful base Naruto has become.
Too the people who are trying to clam Madara statue isn't round think again -
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If it wasn't for the background in both of their scenes we wouldn't know which head Naruto and Sasuke were standing on.