The angle is only part of it, but you can clearly tell that Madara's PS is larger. Sasuke's crouching isn't any kind of excuse.
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Are you really going to tell me that if this stood up,
it'd be the size of a Mountain? I'd be surprised if it was larger than the surrounding rocks let alone a Mountain. Sasuke's PS is smaller, and its noticeable
"well apparent?" Sasuke's Susanoo isn't even visible. Either you are looking at the wrong thing, or Susanoo is that white dot, which makes no sense since Susanoo isn't white. Either way, its not even visible, all you can see is a speck of something, so this doesn't even begin to support your point that since you can see it (Not really) its bigger than Madara's. Madara's Susanoo would be the same compared to those meteors.
Completely wrong here. Those are mere piece of the meteors he's already cut up. We already saw him compared to Madara's meteors, and he wasn't even visible. How are you coming to the conclusion that he is the same size now?
His Yin power is Hagoromo's power. One in the same, and the Rinnegan has never shown to amplify its strength, and how this is relevant to the overall point baffles me. It shows that a big Susanoo doesn't mean the strongest Susanoo. The fact Sasuke's is better than his is proof of that. Why its stronger is irrelevant.
It doesn't even make sense for Susanoo's durability to be based on size. Making something larger doesn't make it more durable. You can take a big pierce of paper and a small one, but they'd be the same when it came to durability.